CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Common Stock	Preferred Stock	Capital Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total Bancorp Shareholders' Equity	Non- Controlling Interests
Beginning Balance at Dec. 31, 2016	$ 16,081	$ 2,051	$ 1,331	$ 2,756	$ 13,290	$ 59	$ (3,433)	$ 16,054	$ 27
Net income	2,180				2,180			2,180
Other comprehensive income (loss), net of tax	14					14		14
Cash dividends declared:
Common stock	(436)				(436)			(436)
Preferred stock	(75)				(75)			(75)
Shares acquired for treasury	(1,605)			(17)			(1,588)	(1,605)
Impact of stock transactions under stock compensation plans, net	67			51			16	67
Other	(6)				(2)		3	1	(7)
Ending Balance at Dec. 31, 2017	16,220	2,051	1,331	2,790	14,957	73	(5,002)	16,200	20
Impact of cumulative effect of change in accounting principles at Dec. 31, 2017	4				6	(2)		4
Balance at Dec. 31, 2017	16,224	2,051	1,331	2,790	14,963	71	(5,002)	16,204	20
Net income	2,193				2,193			2,193
Other comprehensive income (loss), net of tax	(183)					(183)		(183)
Cash dividends declared:
Common stock	(499)				(499)			(499)
Preferred stock	(75)				(75)			(75)
Shares acquired for treasury	(1,453)			41			(1,494)	(1,453)
Impact of stock transactions under stock compensation plans, net	65			42			23	65
Other	(22)				(4)		2	(2)	(20)
Ending Balance at Dec. 31, 2018	16,250	2,051	1,331	2,873	16,578	(112)	(6,471)	16,250	0
Impact of cumulative effect of change in accounting principles at Dec. 31, 2018	10				10			10
Balance at Dec. 31, 2018	16,260	2,051	1,331	2,873	16,588	(112)	(6,471)	16,260	0
Net income	2,512				2,512			2,512
Other comprehensive income (loss), net of tax	1,304					1,304		1,304
Cash dividends declared:
Common stock	(691)				(691)			(691)
Preferred stock	(93)				(93)			(93)
Shares acquired for treasury	(1,763)						(1,763)	(1,763)
Issuance of preferred stock issued by a Bancorp subsidiary	242		242					242
Conversion of outstanding preferred stock issued by a Bancorp subsidiary	0		197					197	(197)
Impact of MB Financial, Inc. acquisition	3,356			712			2,447	3,159	197
Impact of stock transactions under stock compensation plans, net	72			14	2		56	72
Other	4				(3)		7	4
Ending Balance at Dec. 31, 2019	$ 21,203	$ 2,051	$ 1,770	$ 3,599	$ 18,315	$ 1,192	$ (5,724)	$ 21,203	$ 0