2.2.0.7 false Long-Term Debt Maturities (Detail) (USD $) 143 - Disclosure - Long-Term Debt Maturities (Detail) true false In Millions false false 1 USD false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 pure Standard http://www.xbrl.org/2003/instance pure 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 shares Standard http://www.xbrl.org/2003/instance shares 0 $ 5 3 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths us-gaap true credit instant No definition available. false false false false false false false false false false false false 1 true true false false 564000000 564 false false false xbrli:monetaryItemType monetary Amount of long-term debt maturing within the next twelve months following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b false 6 3 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo us-gaap true credit instant No definition available. false false false false false false false false false false false false 1 false true false false 2304000000 2304 false false false xbrli:monetaryItemType monetary Amount of long-term debt maturing in year two following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b false 7 3 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree us-gaap true credit instant No definition available. false false false false false false false false false false false false 1 false true false false 3051000000 3051 false false false xbrli:monetaryItemType monetary Amount of long-term debt maturing in year three following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b false 8 3 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour us-gaap true credit instant No definition available. false false false false false false false false false false false false 1 false true false false 1924000000 1924 false false false xbrli:monetaryItemType monetary Amount of long-term debt maturing in year four following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b false 9 3 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive us-gaap true credit instant No definition available. false false false false false false false false false false false false 1 true true false false 2897000000 2897 false false false xbrli:monetaryItemType monetary Amount of long-term debt maturing in year five following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b false 1 5 false Millions UnKnown UnKnown false true