Schedule of Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amortization of deferred acquisition costs	$ 1,235	$ 1,540	$ 1,317
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	1
Finite-Lived Intangible Assets, Amortization Expense, Year Two	1
Finite-Lived Intangible Assets, Amortization Expense, Year Three	1
Finite-Lived Intangible Assets, Amortization Expense, Year Four	1
Finite-Lived Intangible Assets, Amortization Expense, Year Five	1
International [Member]
Amortization of deferred acquisition costs	174	168	204
International [Member] | Other Intangible Assets [Member]
Amortization of deferred acquisition costs			2
Amortization expense included in other operating expenses	$ 1	$ 1	$ 1