Schedule of Other Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Amortization of deferred acquisition costs	$ 329	$ 328
Finite-Lived Intangible Assets, Amortization Expense, Year Two	1
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
Hardy [Member]
Amortization of deferred acquisition costs	28	21
Other Intangible Assets [Member] | Hardy [Member]
Amortization of deferred acquisition costs	1	9
Amortization expense included in other operating expenses		$ 3