v2.4.1.9
Condensed Financial Information Of Registrant Dividends (Details) (Parent Company [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Parent Company [Member]
     
Cash Dividends Paid to Parent Company by Unconsolidated Subsidiaries $ 54us-gaap_CashDividendsPaidToParentCompanyByUnconsolidatedSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
$ 21us-gaap_CashDividendsPaidToParentCompanyByUnconsolidatedSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
$ 29us-gaap_CashDividendsPaidToParentCompanyByUnconsolidatedSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember