Consolidated Statements of Comprehensive Income Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to Parent	$ 492	$ 483	$ 939		$ 912
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	136	(201)	415		(115)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	73	(34)	223		10
Credit Risk Adjustment	0	0	(2)	[1]	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	3	6	62		(67)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	212	(229)	698		(172)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 704	$ 254	$ 1,637		$ 740

[1] Related to the Company's early adoption of the ASU 2016-01 provision related to changes in instrument-specific credit risk. See Note 1, "Significant Accounting Policies," and Note 17, "Accumulated Other Comprehensive Income/(Loss)," for additional information.