Schedule V - Valuation and Qualifying Accounts and Reserves (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Allowance for Loans and Leases Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 8		$ 7		$ 19
Charged (Credited) to costs and expenses	4		4		10
Charged (Credited) to other accounts	0		0		0
Other deductions	0	[1]	(3)	[1]	(22)	[1]
Balance at end of period	12		8		7
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	43		51		45
Charged (Credited) to costs and expenses	53		0		4
Charged (Credited) to other accounts	5		(2)		1
Other deductions	0		(6)		1
Balance at end of period	101		43		51
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	49		42		45
Charged (Credited) to costs and expenses	21		7		4
Charged (Credited) to other accounts	(21)		0		(7)
Other deductions	0		0		0
Balance at end of period	49		49		42
Allowance for Reinsurance Recoverable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	4		4		5
Charged (Credited) to costs and expenses	0		0		(1)
Charged (Credited) to other accounts	0		0		0
Other deductions	0		0		0
Balance at end of period	$ 4		$ 4		$ 4

[1] Amounts for commercial mortgage loans primarily reflect charge-offs upon sales and repayments, as well as transfers to foreclosed real estate. 2012 amount also includes restructures reclassified to Other Long-term Investments.