Other (Income) Expense (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Other (Income) Expense [Abstract]
Losses from separate account assets	$ 36
Equity in net (income) loss of partially-owned entities	(40)		(81)		39
Federal excise and capital taxes	20		19		16
Amortization of intangible assets	29		9		11
Noncontrolling interest expense	2		14		3
Other	26	[1]	23	[1]	16	[1]
Other (income) expense	73		(16)		85
Acquisition-related costs	$ 5		$ 14

[1] Included in Other are acquisition-related costs of $5 million and $14 million in 2011 and 2010, respectively. Acquisition-related costs were immaterial in 2009.