Consolidated Statements of Comprehensive Income Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to Parent	$ 580	$ 643	[1]
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	377	(425)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	76	(124)
Other Comprehensive Income (Loss), Brokered Time Deposits, Net of Tax	(1)	1
Other Comprehensive Income (Loss), Long Term Debt, Adjustment, Net of Tax	(1)	2
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	3	(2)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	454	(548)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 1,034	$ 95

[1] During the second quarter of 2018, certain of the Company's business banking clients were transferred from the Wholesale business segment to the Consumer business segment. For all periods prior to the second quarter of 2018, the corresponding financial results have been transferred to the Consumer business segment for comparability purposes.