Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Activities
Net income		$ 218	$ 187	$ 63
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization		70	56	40
Provision (benefit) for loan losses		18	(8)	6
Net gain on loan and asset sales		(335)	(200)	(268)
Proceeds from sales of HFS		15,866	8,935	9,245
Origination, premium paid and purchase of loans, net of principal repayments		(32,715)	(32,261)	(34,235)
Net change in:
Other		(205)	(87)	(173)
Net cash used in operating activities		(17,083)	(23,378)	(25,322)
Investing Activities
Proceeds from sale of AFS securities including loans that have been securitized		15,873	23,721	24,646
Collection of principal on investment securities AFS		184	199	218
Purchase of investment securities AFS and other		(500)	(340)	(904)
Collection of principal on investment securities HTM		106	92	154
Proceeds received from the sale of LHFI		219	161	104
Net origination, purchase, and principal repayments of LHFI		(3,179)	(978)	(1,760)
Acquisition of premises and equipment, net of proceeds		(61)	(71)	(97)
Purchase of bank owned life insurance		0	0	50
Net purchase of FHLB stock		0	0	123
Proceeds from the sale of MSRs		62	334	309
Assets acquired (liabilities assumed) in business combinations		0	1,499	(8)
Other, net		(16)	(10)	5
Net cash provided by investing activities		12,688	24,607	22,494
Financing Activities
Net change in deposit accounts		2,766	1,072	134
Net change in short term FHLB borrowings and other		923	(1,016)	2,480
Proceeds from increases in FHLB long-term advances and other debt		550	200	255
Repayment of long-term FHLB advances		(50)	(1,455)	(50)
Net receipt of payments of loans serviced for others		284	181	22
Preferred stock dividends		(9)	0	0
Stock repurchase		50	0	0
Other		5	(2)	2
Net cash provided (used) by financing activities		4,419	(1,020)	2,843
Net increase (decrease) in cash, cash equivalents and restricted cash	[1]	24	209	15
Beginning cash, cash equivalents and restricted cash	[1]	432	223	208
Ending cash, cash equivalents and restricted cash	[1]	456	432	223
Supplemental disclosure of cash flow information
Interest paid on deposits and other borrowings		230	185	136
Income tax payments		4	0	5
Non-cash reclassification of investment securities HTM to AFS		0	144	0
Non-cash reclassification of loans originated LHFI to LHFS		120	279	131
Non-cash reclassification of mortgage loans HFS to HFI		0	0	0
Non-cash reclassification of LHFS to AFS securities		15,458	23,718	24,345
MSRs resulting from sale or securitization of loans		$ 223	$ 356	$ 288

[1] For further information on restricted cash, see Note 11 - Derivatives.