Schedule of Other Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Amortization of deferred acquisition costs	$ 1,317	$ 1,362	$ 1,274
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	1
Finite-Lived Intangible Assets, Amortization Expense, Year Two	2
Finite-Lived Intangible Assets, Amortization Expense, Year Three	2
Finite-Lived Intangible Assets, Amortization Expense, Year Four	2
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2
International [Member]
Amortization of deferred acquisition costs	204	223	152	[1]
Other Intangible Assets [Member] | International [Member]
Amortization of deferred acquisition costs	2	15	33
Amortization expense included in other operating expenses	$ 1	$ 5	$ 10

[1] International includes Hardy from the date of acquisition.