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Unrecognized Tax Benefit Reconciliation (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 28, 2012
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| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
| Unrecognized tax benefit at beginning of year | $ 34us-gaap_UnrecognizedTaxBenefits | $ 29us-gaap_UnrecognizedTaxBenefits | $ 39us-gaap_UnrecognizedTaxBenefits |
| Change attributable to withdrawal of tax positions previously taken or expected to be taken | 12mar_UnrecognizedTaxBenefitsDecreasesResultingFromWithdrawalOfTaxPositionsPreviouslyTakenOrExpectedToBeTaken | ||
| Change attributable to tax positions taken during the current period | (20)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions | ||
| Change attributable to tax positions taken during the current period | 3us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 8us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | |
| Decrease attributable to settlements with taxing authorities | (27)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities | (2)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities | |
| Decrease attributable to lapse of statute of limitations | 0us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations | (1)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations | (2)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations |
| Unrecognized tax benefit at end of year | $ 10us-gaap_UnrecognizedTaxBenefits | $ 34us-gaap_UnrecognizedTaxBenefits | $ 29us-gaap_UnrecognizedTaxBenefits |
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- Definition
Unrecognized Tax Benefits, Decreases Resulting from the Withdrawal of Tax Positions Previously Taken or Expected to be Taken No definition available.
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- Details
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- Definition
Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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