2.2.0.7 false Description of Business, Recent Developments and Basis of Presentation (Details) (USD $) 01080 - Disclosure - Description of Business, Recent Developments and Basis of Presentation (Details) true false In Millions, except Per Share data false false 1 USD false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 PerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 2 USD false false PerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 3 USD false false PerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 4 USD false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 PerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 5 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 PerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 6 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 PerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ 2 Description Of Business Recent Developments And Basis Of Presentation Details Abstract 0 twc_DescriptionOfBusinessRecentDevelopmentsAndBasisOfPresentationDetailsAbstract twc false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 3 Value of common stock authorized to be repurchased 1 twc_TreasuryStockAcquiredRepurchaseAuthorizationValue twc false debit duration Represents the aggregate value of common stock the Board of Directors authorized to be repurchased. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 true true false false 4000000000 4000 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Represents the aggregate value of common stock the Board of Directors authorized to be repurchased. No authoritative reference available. false 4 Cash dividends paid per share (in US dollars per share) 1 us-gaap_CommonStockDividendsPerShareCashPaid us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel true 1 true true false false 0.4 0.4 false false false 2 true true false false 0.4 0.4 false false false 3 true true false false 0.4 0.4 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false us-types:perShareItemType decimal Aggregate dividends paid during the period for each share of common stock outstanding. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a false 6 Cash dividends declared per share subsequent to period end (in US dollars per share) 1 twc_CommonStockDividendsPerShareDeclaredSubsequentEvent twc false na duration Aggregate dividends declared subsequent to the period for each share of common stock outstanding. false false false false false false false false false false false terselabel true 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 true true false false 0.4 0.4 false false false 6 false false false false 0 0 false false false us-types:perShareItemType decimal Aggregate dividends declared subsequent to the period for each share of common stock outstanding. No authoritative reference available. false 7 TWC common stock owned by Time Warner (in percent) 1 twc_StockHeldByParent twc false na instant Common stock held by Parent Company prior to separation. false false false false false false false false false false false terselabel false 1 false true false false 0.84 0.84 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 0.84 0.84 false false false 6 false false false false 0 0 false false false us-types:percentItemType pure Common stock held by Parent Company prior to separation. No authoritative reference available. false 8 Time Warner's common stock voting interest in TWC (in percent) 1 twc_ParentVotingInterest twc false na instant Parent Company's common stock voting interest prior to separation. false false false false false false false false false false false terselabel false 1 false true false false 0.906 0.906 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 0.906 0.906 false false false 6 false false false false 0 0 false false false us-types:percentItemType pure Parent Company's common stock voting interest prior to separation. No authoritative reference available. false 9 Time Warner's common stock non-voting interest in TW NY (in percent) 1 twc_ParentNonVotingInterest twc false na instant Parent Company's common stock non-voting interest prior to separation. false false false false false false false false false false false terselabel false 1 false true false false 0.1243 0.1243 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 0.1243 0.1243 false false false 6 false false false false 0 0 false false false us-types:percentItemType pure Parent Company's common stock non-voting interest prior to separation. No authoritative reference available. false 10 Net income attributable to TWC shareholders (in US dollars) 1 us-gaap_NetIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 360000000 360 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false true false false 268000000 268 false false false 5 false true false false 916000000 916 false false false 6 false true false false 748000000 748 false false false xbrli:monetaryItemType monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph d Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A7 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 10, 15 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28, 29, 30 false 11 Net income allocated to participating securities (in US dollars) 1 twc_NetIncomeLossParticipatingSecurities twc false debit duration The portion of consolidated profit or loss allocated to participating securities for the period, net of income taxes. false false false false false false false false false false true negated false 1 false true false false -3000000 -3 [1] false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false true false false 0 0 [1] false false false 5 false true false false -7000000 -7 [1] false false false 6 false true false false 0 0 [1] false false false xbrli:monetaryItemType monetary The portion of consolidated profit or loss allocated to participating securities for the period, net of income taxes. No authoritative reference available. false 12 Net income attributable to TWC common shareholders (in US dollars) 1 twc_NetIncomeLossCommonShareholders twc false credit duration The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the common... false false false false false false false false false false false totallabel false 1 true true false false 357000000 357 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 true true false false 268000000 268 false false false 5 true true false false 909000000 909 false false false 6 true true false false 748000000 748 false false false xbrli:monetaryItemType monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the common shareholders of the parent. No authoritative reference available. true 13 Average common shares outstanding - basic (in shares) 1 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic us-gaap true na duration No definition available. false false false false false false false false false false false terselabel false 1 false true false false 355500000 355.5 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false true false false 352400000 352.4 false false false 5 false true false false 354400000 354.4 false false false 6 false true false false 347900000 347.9 false false false xbrli:sharesItemType shares Number of [basic] shares, after adjustment for contingently issuable shares and other shares not deemed outstanding, determined by relating the portion of time within a reporting period that common shares have been outstanding to the total time in that period. 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No authoritative reference available. false 15 Average common shares outstanding - diluted (two-class method) (in shares) 1 twc_AverageSharesTwoClassMethod twc false na duration The average number of shares issued and outstanding that are used in calculating diluted EPS under the two-class method,... false false false false false false false false false false false totallabel false 1 false true false false 357800000 357.8 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false true false false 353000000 353.0 false false false 5 false true false false 356600000 356.6 false false false 6 false true false false 348000000 348.0 false false false xbrli:sharesItemType shares The average number of shares issued and outstanding that are used in calculating diluted EPS under the two-class method, determined based on the timing of issuance of shares in the period. No authoritative reference available. true 16 Dilutive effect of participating equity awards (in shares) 1 twc_AverageParticipatingShares twc false na duration The sum of participating dilutive potential common shares used in the calculation of the diluted per-share computation. false false false false false false false false false false false terselabel false 1 false true false false 3200000 3.2 [1] false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false true false false 1500000 1.5 [1] false false false 5 false true false false 2800000 2.8 [1] false false false 6 false true false false 900000 0.9 [1] false false false xbrli:sharesItemType shares The sum of participating dilutive potential common shares used in the calculation of the diluted per-share computation. No authoritative reference available. false 17 Average common shares outstanding - diluted (treasury stock method) (in shares) 1 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding us-gaap true na duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 361000000 361.0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false true false false 354500000 354.5 false false false 5 false true false false 359400000 359.4 false false false 6 false true false false 348900000 348.9 false false false xbrli:sharesItemType shares The average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 true 18 Net income per common share attributable to TWC common shareholders - basic (in US dollars per share) 1 us-gaap_EarningsPerShareBasic us-gaap true na duration No definition available. false false false false false false false false false false false true 1 true true false false 1.00 1.00 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 true true false false 0.76 0.76 false false false 5 true true false false 2.56 2.56 false false false 6 true true false false 2.15 2.15 false false false us-types:perShareItemType decimal The amount of net income or loss for the period per each share of common stock outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 36, 37, 38 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 false 19 Net income per common share attributable to TWC common shareholders - diluted (in US dollars per share) 1 us-gaap_EarningsPerShareDiluted us-gaap true na duration No definition available. false false false false false false false false false false false true 1 true true false false 1.00 1.00 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 true true false false 0.76 0.76 false false false 5 true true false false 2.55 2.55 false false false 6 true true false false 2.14 2.14 false false false us-types:perShareItemType decimal The amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents outstanding during the reporting period. 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