Document and Entity Information [Abstract] Document and Entity Information [Abstract] Supplemental Financial Information [Abstract] Supplemental Financial Information [Abstract] Film and Television Costs [Text Block] Film and Television Costs [Text Block] Film And Television Costs The current portion of acquired television and cable networks programming rights recorded on the balance sheet. Includes multi-year programming arrangements, acquired movies, series and other programs. Carrying amount is stated at the lower of cost, less accumulated amortization, or net realizable value at the balance sheet date. Programming Rights Current Programming rights The carrying amount of owned films, television series and other television productions and noncurrent acquired television and cable network's programming rights recorded on the balance sheet. Owned films, television series and other television production costs include capitalizable production costs, including direct costs, production overhead, print costs, development costs and interest. Film and television rights include multi-year programming arrangements, acquired movies, series and other programs. The carrying amount is stated at the lower of cost, less accumulated amortization, or fair value at the balance sheet date. Film and Television Costs. Film and television costs Accrued participations and residuals current Accrued Participations and Residuals Current Accrued participations and residuals Program obligations Program Obligations Program obligations Operating costs and expenses including amortization of film and television costs but excluding intangible amortization and depreciation Operating Costs and Expenses Excluding Depreciation and Amortization Operating costs and expenses Operating costs and expenses Receivables monetization (abstract) Receivables Monetization [Abstract] Receivables monetization disclosure [text block] Receivables Monetization Disclosure [Text Block] Receivables Monetization Receivables Monetization Disclosure [Text Block] The amount of ownership interest of members in a limited liability company. Members Capital Member's capital This element represents the adjustment to additional paid-in capital for noncash compensation related expenses. Noncash Compensation Compensation plans Profit or loss as represented on the statement of changes in equity. Equity Profit Loss Net income (loss) Distributions to noncontrolling interests, net of contributions. Distributions to Noncontrolling Interest Net Distributions to noncontrolling interests, net Distributions to noncontrolling interests, net The total amount due to or from GE, with respect to cash pooling arrangements, as of the balance sheet date and payable within one year. Short Term Loans To G E Net Short-term loans to GE, net Decrease in short term loans to GE, net. Decrease In Short Term Loans To G E Net (Increase) decrease in short-term loans to GE, net Members Equity Remeasured Member's equity, remeasured Member's equity, remeasured Contribution of Comcast Content Business Contribution of Business Contribution of Comcast Content Business Contribution of Comcast Content Business Total Members Equity Total member's equity at January 28, 2011 Total member's equity Total member's equity Total member's equity Total member's equity Distributions to noncontrolling interests, net Distributions to noncontrolling interests, net of contributions. Contributions from (distributions to) noncontrolling interests, net Members Capital Other Other Member's capital other Members Capital [Member] Member's Capital [Member] Accrued Participations Residuals And Program Obligations Noncurrent Accrued participations, residuals and program obligations Accrued participations, residuals and program obligations, noncurrent Proceeds From Borrowings From Comcast Proceeds from borrowings from Comcast Proceeds from borrowings from Comcast Noncontrolling Interest Increase From Equity Issuance Or Sale Of Parent Equity Interest Issuance of subsidiary shares to noncontrolling interest Represents an increase in noncontrolling interest from issuance of additional equity interests to noncontrolling interest holders or the sale of a portion of the parent's controlling interest and the impact on additional paid in capital. Other O C I Other, net The total amount of other net changes to other comprehensive income during the period. Amortization Of Film And Television Costs Amortization of film and television costs Amortization Of Film And Television Costs Gain Loss On Investments And Noncash Other Income Expense Net Net (gain) loss on investment activity and other This item represents (i) the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain or loss of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain or loss which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period; additionally, this item would include any gains or losses realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments of the subject investments, (ii) Gains and other income producing transactions that result in no cash inflows or outflows in the period in which they occur, but increase net income and thus are subtracted (removed) when calculating net cash flow from operating activities using the indirect method, and (iii) Other expenses included in net income that result in no cash inflows or outflows in the period which are not otherwise defined in the taxonomy. Change In Film And Television Costs Change in film and television costs Change in Film and Television Costs Increase Decrease In Accrued Participations And Residuals Program Obligations And Deferred Revenue Change in accrued participations and residuals, program obligations and deferred revenue Change in accrued participations and residuals, program obligations and deferred revenue. Proceeds From Sale Of Businesses And Investments Proceeds from sale of businesses and investments Proceeds from sale of businesses and investments Purchases Of Investments And Other Assets Purchases of investments The cash outflow associated with the purchase of investments and other assets during the period. Repayments Of Borrowings From Comcast Repayments of borrowings from Comcast Repayments of borrowings from Comcast. Members Equity [Text Block] Disclosures related to accounts comprising Member's equity, including other comprehensive income. Condensed Consolidating Financial Information [Abstract] Condensed Consolidated Financial Statements [Abstract] Goodwill [Abstract] Receivables, Net, Current, Total Receivables, net Accounts Receivable, Net, Current Accounts Receivable, Net, Noncurrent Noncurrent receivables, net Accounts Receivable, Net, Noncurrent, Total Intangible assets, net, accumulated amortization Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated other comprehensive income (loss) Property and equipment, net, accumulated depreciation Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Additional Paid in Capital Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional paid-in capital Additional Paid in Capital, Total Depreciation Depreciation Depreciation, Total Depreciation Cash received from investees Amortization of Intangible Assets Amortization Amortization Amortization of Intangible Assets, Total Due to Related Parties, Noncurrent Due to Related Parties, Noncurrent, Total Related party borrowings Condensed Consolidated Balance Sheet Payments of Capital Distribution Distributions to member Distributions to member Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Change in accounts payable and accrued expenses related to trade creditors Increase (decrease) in receivables, net Change in receivables, net Proceeds from (repayments of) short-term borrowings, net Changes in operating assets and liabilities, net of effects of acquisitions and divestitures: Commitments and Contingencies Disclosure [Text Block] Commitments And Contingencies Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common Stock, Shares, Issued, Total Common stock, shares issued Common Stock, Value, Issued Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common stock, $0.01 par value per share, authorized 2,000 and issued 1,000 Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income Comprehensive income (loss) attributable to NBCUniversal Condensed Consolidating Financial Information Condensed Financial Information of Parent Company Only Disclosure [Text Block] Liabilities, Current Total current liabilities Total current liabilities Current portion of long-term debt Long-term Debt and Capital Lease Obligations Long-term debt, less current portion Long-term Debt and Capital Lease Obligations, Total Deferred income taxes Deferred Tax Liabilities, Noncurrent Deferred income taxes Deferred Revenue, Current Deferred Revenue, Current, Total Deferred revenue Deferred Revenue, Noncurrent Deferred Revenue, Noncurrent, Total Deferred revenue Depreciation and amortization Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Financial Instruments Equity in income of investees, net Equity in income of investees, net Equity in income of investees, net Income (Loss) from Equity Method Investments, Total Noncash compensation expense Condensed Consolidated Statement Of Income Income Tax Disclosure [Text Block] Income Taxes Intangible Assets, Net (Excluding Goodwill) Intangible Assets, Net (Excluding Goodwill), Total Intangible assets, net of accumulated amortization of $2,647 and $2,462 Goodwill Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Interest Expense Interest expense Interest Expense, Total Interest expense Liabilities and Equity Total liabilities and equity Liabilities and Equity [Abstract] Liabilities and Equity Long-term Investments Investments Long-term Investments, Total Stockholders' Equity Attributable to Noncontrolling Interest Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity Attributable to Noncontrolling Interest, Total Noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Distributions to noncontrolling interests Distributions to noncontrolling interests Distributions to noncontrolling interests, net Noncontrolling Interests Related Party Transactions, by Related Party [Axis] Net Cash Provided by (Used in) Financing Activities Net cash (used in) provided by financing activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Financing activities Net Cash Provided by (Used in) Investing Activities Net cash (used in) provided by investing activities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Investing activities Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operating activities Net cash provided by (used in) operating activities Net Income (Loss) Attributable to Parent Net income (loss) attributable to NBCUniversal Cash and Cash Equivalents, Period Increase (Decrease) Increase (decrease) in cash and cash equivalents Increase (decrease) in cash and cash equivalents Recent Accounting Pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Recent Accounting Pronouncements Nonoperating Income (Expense) Total other income (expense) Nonoperating Income (Expense) [Abstract] Other Income (Expense): Operating Income (Loss) Operating income Revenues Revenues, Total Revenue Condensed Consolidated Financial Statements Change in other operating assets and liabilities Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Employee benefit obligations, net Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Total Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Currency translation adjustments, net Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Total Other comprehensive income (loss) Other Assets, Current Other current assets Payments for (Proceeds from) Other Investing Activities Other Other Nonoperating Income (Expense) Other Nonoperating Income (Expense), Total Other income (expense), net Payments of Dividends Dividends paid Dividends paid Payments of Dividends, Total Pension and Other Postretirement Benefits Disclosure [Text Block] Pension Plans and Postretirement Benefits Proceeds from Noncontrolling Interests Contributions from noncontrolling interests Proceeds from Other Debt Proceeds from third-party borrowings Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Total Property and equipment, net of accumulated depreciation of $750 and $637 Property and Equipment [Abstract] Cash paid for intangible assets Payments to Acquire Intangible Assets Payments to Acquire Property, Plant, and Equipment Capital expenditures Capital expenditures Payments to Acquire Property, Plant, and Equipment, Total Operating Activities Related Party [Domain] Related Party Transactions Disclosure [Text Block] Related Party Transactions Repayments of Other Debt Repurchases and repayments of debt Repayments of third-party borrowings Payments for Repurchase of Preferred Stock and Preference Stock Repurchase of preferred stock interest Repurchase of preferred stock interest Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Retained earnings Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Segments Financial Data By Business Segment Significant Accounting Policies [Text Block] Significant Accounting Policies Condensed Consolidated Statement Of Cash Flows Condensed Consolidated Statement Of Comprehensive Income Condensed Consolidated Statement Of Changes In Equity Stockholders' Equity Attributable to Parent [Abstract] NBCUniversal member's equity: Equity: Assets, Current Total current assets Common Stock [Member] Property and Equipment Assets Total assets Investment Income, Interest Interest income Other Liabilities, Noncurrent Other noncurrent liabilities Other Liabilities, Noncurrent, Total Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Share-Based Compensation Scenario, Unspecified [Domain] Statement [Table] Statement, Scenario [Axis] Assets [Abstract] Assets Statement [Line Items] Equity [Abstract] Investments Fair Value Disclosures [Text Block] Fair Value Measurements Other Assets, Noncurrent Other Assets, Noncurrent, Total Other noncurrent assets Common Stock, Par or Stated Value Per Share Common stock, par value Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total NBCUniversal member's equity Income Tax Expense (Benefit) Income tax (expense) benefit Income Tax Expense (Benefit), Total (Provision) benefit for income taxes Statement, Equity Components [Axis] Additional Paid-in Capital [Member] Retained Earnings [Member] Accumulated Other Comprehensive (Loss) Income [Member] Equity Component [Domain] Long-term Debt [Text Block] Long-Term Debt Costs and Expenses [Abstract] Costs and Expenses: Costs and Expenses Total costs and expenses Total costs and expenses Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income (loss) Net income (loss) Net income (loss) from consolidated operations Net Income (Loss) Attributable to Noncontrolling Interest Net (income) loss attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest, Total Net (income) loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Total comprehensive income Comprehensive income (loss) Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Total stockholders' equity Noncontrolling Interests [Member] Business Combination Disclosure [Text Block] Acquisitions And Dispositions Commitments and Contingencies, Liabilities Commitments and contingencies Commitments and contingencies Dividends, Cash Dividends declared Dividends declared Dividends, Cash, Total Predecessor [Member] Successor [Member] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Accounts payable and accrued expenses related to trade creditors Accounts Payable and Accrued Liabilities, Current, Total Accrued expenses and other current liabilities Accounts Payable and Accrued Liabilities, Current, Total Related Party Borrowings Current Related party borrowings Compensation plans Stockholders' Equity, Other Other Other Income (loss) before income taxes Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Redeemable Noncontrolling Interest, Equity, Carrying Amount Redeemable Noncontrolling Interest, Equity, Carrying Amount, Total Redeemable noncontrolling interests Payments for Repurchase of Redeemable Noncontrolling Interest Purchases of noncontrolling interests Additional Financial Information Disclosure [Text Block] Supplemental Financial Information Film And Television Costs Acquisitions and Dispositions Commitments And Contingencies Income Taxes Fair Value Measurements Subsequent Events [Text Block] Subsequent Events Long-Term Debt Goodwill Disclosure Pension Plans and Postretirement Benefits Derivative Financial Instruments Share-Based Compensation Significant Accounting Policies Noncontrolling Interest [Abstract] Financial Data By Business Segment Related Party Transactions Subsequent Events Valuation and Qualifying Accounts [Abstract] Amendment Flag Current Fiscal Year End Date Document Period End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Document Type Investment [Text Block] Investments