Consolidated Statements Of Changes In Shareholders' Equity - USD ($) shares in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]
Common stock, outstanding shares			203,085
Balance at Dec. 31, 2017		$ 566,000,000	$ 4,445,000,000	$ 0	$ 2,807,000,000	$ (139,000,000)	$ 7,679,000,000
Increase (Decrease) in Deferred Compensation					25,000,000	(25,000,000)	0
Dividends on common stock					(89,000,000)		(89,000,000)
Dividends on preferred stock		(0.44)			(40,000,000)		(40,000,000)
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			$ 39,000,000				39,000,000
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			1,491
Subordinated debt converted to preferred stock			$ 321,000,000
Bank common stock repurchased							321,000,000
Bank common stock repurchased, shares			7,044
Preferred stock redemption		(144,000,000)	$ (2,000,000)		(2,000,000)		(144,000,000)
Other Comprehensive Income (Loss), Net of Tax	$ (17,000,000)					8,000,000	8,000,000
Net Income	592,000,000				592,000,000		592,000,000
Balance at Dec. 31, 2016		710,000,000	$ 4,725,000,000	0	2,321,000,000	122,000,000	7,634,000,000
Common stock, outstanding shares			197,532
Balance at Dec. 31, 2018	$ 7,578,000,000	566,000,000	$ 0	3,806,000,000	3,456,000,000	(250,000,000)	7,578,000,000
Dividends on common stock					(202,000,000)		(202,000,000)
Dividends on preferred stock		(1.04)			(34,000,000)		(34,000,000)
Employee Plans, Accumulated Paid-in Capital				4,000,000
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			$ 29,000,000				33,000,000
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			1,236
Subordinated debt converted to preferred stock			$ 422,000,000				0
Net Shares Issued From Stock Warrant Exercises	1,800		1,770
Bank common stock repurchased, accumulated paid-in capital				250,000,000
Bank common stock repurchased							672,000,000
Bank common stock repurchased, shares	12,900		12,984
Other Comprehensive Income (Loss), Net of Tax	$ (111,000,000)					(111,000,000)	(111,000,000)
Cumulative Effect Adjustment-Revenue Recognition					1,000,000		1,000,000
Adjustments to Additional Paid in Capital, Other				4,052,000,000
Common Stock, Adjustments			$ 4,052,000,000
Net Income	884,000,000				884,000,000		884,000,000
Balance at Dec. 31, 2017		566,000,000	$ 4,445,000,000	0	2,807,000,000	(139,000,000)	7,679,000,000
Common stock, outstanding shares			187,554
Balance at Dec. 31, 2019	$ 7,353,000,000	566,000,000	$ 0	2,735,000,000	4,009,000,000	43,000,000	7,353,000,000
Dividends on common stock					(226,000,000)		(226,000,000)
Dividends on preferred stock		(1.28)			(34,000,000)		(34,000,000)
Employee Plans, Accumulated Paid-in Capital				31,000,000
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures							31,000,000
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures			1,026
Subordinated debt converted to preferred stock							0
Net Shares Issued From Stock Warrant Exercises			8
Bank common stock repurchased, accumulated paid-in capital				1,102,000,000
Bank common stock repurchased							1,102,000,000
Bank common stock repurchased, shares	23,500		23,531
Other Comprehensive Income (Loss), Net of Tax	$ 293,000,000					293,000,000	293,000,000
Cumulative Effect Adjustment-Revenue Recognition					(3,000,000)		(3,000,000)
Adjustments to Additional Paid in Capital, Other	1,100,000,000
Net Income	816,000,000				816,000,000		816,000,000
Balance at Dec. 31, 2018	$ 7,578,000,000	566,000,000	$ 0	3,806,000,000	3,456,000,000	(250,000,000)	7,578,000,000
Common stock, outstanding shares	187,554
Balance at Dec. 31, 2019	$ 7,353,000,000	$ 566,000,000	$ 0	$ 2,735,000,000	$ 4,009,000,000	$ 43,000,000	$ 7,353,000,000
Net Income	$ 183,000,000
Common stock, outstanding shares	165,057		165,057