Consolidated Statements of Cash Flows - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Cash Flows from Operating Activities:
Net income		$ 446	$ 321
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		(1)	51
Depreciation		16	18
Amortization of discounts and premiums, net		(4)	11
Net gain on sales of loans		(1)
Stock-based compensation		24	25
Deferred tax expense		(6)	95
Changes in operating assets and liabilities:
Increase in other assets	[1]	(314)	(164)
Increase (decrease) in other liabilities	[2]	(33)	3
Purchases of securities held for trading		(110)	(15)
Proceeds from sales of securities held for trading		110	15
Held for sale originations		(52)	(119)
Net cash provided by operating activities		75	241
Cash Flows from Investing Activities:
Proceeds from repayment of securities available for sale		1,399	1,595
Proceeds from sales of securities available for sale			484
Purchase of securities available for sale		(1,567)	(1,473)
Redemption of Federal Home Loan Bank stock		67	144
Purchases of Federal Home Loan Bank stock		(37)	(194)
Proceeds from bank-owned life insurance, net		10	8
Proceeds from sales of loans		37	3
Purchases of loans		(133)	(51)
Other changes in loans, net		(530)	(896)
(Purchases) dispositions of premises and equipment, net		(3)	4
Net cash used in by investing activities		(757)	(376)
Cash Flows from Financing Activities:
Net increase in deposits		2,184	48
Net increase in short-term borrowed funds			1,575
Proceeds from long-term borrowed funds		650	4,625
Repayments of long-term borrowed funds		(1,300)	(5,076)
Cash dividends paid on common stock		(237)	(236)
Cash dividends paid on preferred stock		(25)	(25)
Treasury stock repurchased			(50)
Payments relating to treasury shares received for restricted stock award tax payments		(16)	(9)
Net cash provided by financing activities		1,256	852
Net increase (decrease) in cash, cash equivalents, and restricted cash		574	717
Cash, cash equivalents, and restricted cash at beginning of period		1,948	742
Cash, cash equivalents, and restricted cash at end of period		2,522	1,459
Supplemental information:
Cash paid for interest		311	519
Cash paid for income taxes		471	17
Non-cash investing and financing activities:
Transfers to repossessed assets from loans		1
Securitization of residential mortgage loans to mortgage-backed securities available for sale		133	42
Transfer of loans from held for investment to held for sale		52
Transfer of loans from held for sale to held for investment		94
Shares issued for restricted stock awards		$ 28	$ 22

[1] Includes $15 million and $15 million of amortization of operating lease right-of-use assets for the nine months ended September 30, 2021 and 2020, respectively.

[2] Includes $15 million and $15 million of amortization of operating lease liability for the nine months ended September 30, 2021 and 2020, respectively.