Equity AOCI (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Equity [Abstract]
Net unrealized gains on AFS securities for which we have not recorded OTTI, net of tax	$ 198	$ 455
Net unrealized gains on AFS securities for which we have recorded OTTI, net of tax	682	903
Other, net of tax	43	49
Accumulated other comprehensive income	$ 923	$ 1,407