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Finance Receivables And Loans, Net Finance Receivables And Loans, Net (Schedule of Purchases of Financing Receivables and Loans) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Significant Purchases $ 654us-gaap_FinancingReceivableSignificantPurchases $ 0us-gaap_FinancingReceivableSignificantPurchases
Residential Mortgage [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Significant Purchases $ 654us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_ProductOrServiceAxis
= us-gaap_ResidentialMortgageMember		 $ 0us-gaap_FinancingReceivableSignificantPurchases
/ us-gaap_ProductOrServiceAxis
= us-gaap_ResidentialMortgageMember