Revenue from Contracts with Customers (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2018		Jun. 30, 2017	Jun. 30, 2018		Jun. 30, 2017
Card fees		$ 60	[1]	$ 80	$ 119	[1]	$ 157
Service charges on deposit accounts		53	[1]	57	107	[1]	115
Fiduciary income		52		51	104		100
Commercial loan servicing fees	[2]	5		6	9		9
Brokerage fees		6		6	13		11
Other noninterest income	[3]	11		12	23		29
Total revenue from contracts with customers		187		212	375		421
Other sources of noninterest income		61		64	117		126
Total noninterest income		248		276	492		547
Business Bank
Card fees		47	[1]	65	94	[1]	129
Service charges on deposit accounts		28	[1]	30	58	[1]	62
Fiduciary income		0		0	0		0
Commercial loan servicing fees	[2]	5		6	9		9
Brokerage fees		0		0	0		0
Other noninterest income	[3]	3		2	6		6
Total revenue from contracts with customers		83		103	167		206
Other sources of noninterest income		43		49	80		90
Total noninterest income		126		152	247		296
Retail Bank
Card fees		12	[1]	14	23	[1]	26
Service charges on deposit accounts		23	[1]	25	46	[1]	50
Fiduciary income		0		0	0		0
Commercial loan servicing fees	[2]	0		0	0		0
Brokerage fees		0		0	0		0
Other noninterest income	[3]	3		7	8		15
Total revenue from contracts with customers		38		46	77		91
Other sources of noninterest income		4		2	7		5
Total noninterest income		42		48	84		96
Wealth Management
Card fees		1	[1]	1	2	[1]	2
Service charges on deposit accounts		2	[1]	2	3	[1]	3
Fiduciary income		52		51	104		100
Commercial loan servicing fees	[2]	0		0	0		0
Brokerage fees		6		6	13		11
Other noninterest income	[3]	5		3	9		8
Total revenue from contracts with customers		66		63	131		124
Other sources of noninterest income		1		1	4		4
Total noninterest income		67		64	135		128
Finance & Other
Card fees		0	[1]	0	0	[1]	0
Service charges on deposit accounts		0	[1]	0	0	[1]	0
Fiduciary income		0		0	0		0
Commercial loan servicing fees	[2]	0		0	0		0
Brokerage fees		0		0	0		0
Other noninterest income	[3]	0		0	0		0
Total revenue from contracts with customers		0		0	0		0
Other sources of noninterest income		13		12	26		27
Total noninterest income		13		12	26		27
Adoption of Topic 606 change in presentation
Card fees		37		$ 26	71		$ 51
Decrease in card fees due to change in presentation		37			71
Decrease in service charges on deposit accounts due to change in presentation		$ 1			$ 2

[1] Adoption of Topic 606 resulted in a change in presentation which records certain costs in the same category as the associated revenues. The effect of this change was to reduce card fees by $37 million and $71 million and service charges on deposit accounts by $1 million and 2 million for three- and six-month periods ended June 30, 2018, respectively. Refer to note 1 for further information.

[2] Included in commercial lending fees on the Consolidated Statements of Comprehensive Income.

[3] Excludes derivative, warrant and other miscellaneous income.