2.2.0.7 true Derivatives and Hedge Accounting Activities - Additional Information (Detail) (USD $) 160 - Disclosure - Derivatives and Hedge Accounting Activities - Additional Information (Detail) true false In Millions false false 1 USD true false false false us-gaap_InterestRateContractMember us-gaap_DerivativeInstrumentsGainLossByDerivativeInstrumentRiskAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_InterestRateContractMember us-gaap_DerivativeInstrumentsGainLossByDerivativeInstrumentRiskAxis explicitMember iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ 5 Benefit recorded reflecting the reclassification of gains from AOCI to earnings in connection with the discontinuance of hedge accounting for certain cash flow hedges, before tax 3 us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 true true false false 110000000 110 true false false xbrli:monetaryItemType monetary Pre tax reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 18, 19 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 24 -Subparagraph b Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 31, 46 false 6 Benefit recorded reflecting the reclassification of gains from AOCI to earnings in connection with the discontinuance of hedge accounting for certain cash flow hedges, after tax 3 us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax us-gaap true debit duration No definition available. false false false false false false false false false false false false 1 false true false false 67000000 67 true false false xbrli:monetaryItemType monetary Net of tax effect of the reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 18, 19 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 24 -Subparagraph b Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 31, 46 false 7 Offset changes in fair value to gains on interest rate contract reclassification to earnings, before tax 3 d_ChangeInUnrealizedGainLossOnFairValueNonhedgeInstruments d false credit duration Amount of the increase or decrease in fair value during the period of derivative instruments. Recognized in earnings. false false false false false false false false false false false false 1 false true false false -37000000 -37 true false false xbrli:monetaryItemType monetary Amount of the increase or decrease in fair value during the period of derivative instruments. Recognized in earnings. No authoritative reference available. false 8 Offset changes in fair value to gains on interest rate contract reclassification to earnings, after tax 3 d_ChangeInUnrealizedGainLossOnFairValueNonhedgeInstrumentsAfterTax d false credit duration Change in Unrealized Gain (Loss) on Fair Value Nonhedge Instruments After Tax false false false false false false false false false false false false 1 true true false false -23000000 -23 true false false xbrli:monetaryItemType monetary Change in Unrealized Gain (Loss) on Fair Value Nonhedge Instruments After Tax No authoritative reference available. false 1 4 false Millions UnKnown UnKnown false true