Consolidated Statements of Cash Flows - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020
Cash Flows from Operating Activities:
Net income		$ 297	$ 205
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		0	38
Depreciation		11	13
Amortization of discounts and premiums, net		(3)	10
Net loss (gain) on securities			(1)
Net gain on sales of loans		(1)
Stock-based compensation		16	16
Deferred tax expense		26	77
Changes in operating assets and liabilities:
Increase in other assets	[1]	(255)	(99)
Decrease in other liabilities	[2]	(25)	(9)
Purchases of securities held for trading		(60)
Proceeds from sales of securities held for trading		60
Held for sale originations		(52)	(103)
Net cash provided by operating activities		14	147
Cash Flows from Investing Activities:
Proceeds from repayment of securities available for sale		931	960
Proceeds from sales of securities available for sale			442
Purchase of securities available for sale		(1,252)	(735)
Redemption of Federal Home Loan Bank stock		29	127
Purchases of Federal Home Loan Bank stock		(1)	(148)
Proceeds from bank-owned life insurance, net		7	2
Proceeds from sales of loans		33	3
Purchases of loans		(66)	(48)
Other changes in loans, net		(481)	(379)
(Purchases) dispositions of premises and equipment, net		(2)	3
Net cash (used in) provided by investing activities		(802)	227
Cash Flows from Financing Activities:
Net increase in deposits		1,740	72
Net increase in short-term borrowed funds			1,450
Proceeds from long-term borrowed funds		624	3,125
Repayments of long-term borrowed funds		(1,249)	(4,125)
Cash dividends paid on common stock		(158)	(158)
Cash dividends paid on preferred stock		(16)	(16)
Treasury stock repurchased			(50)
Payments relating to treasury shares received for restricted stock award tax payments		(15)	(9)
Net cash provided by financing activities		926	289
Net increase (decrease) in cash, cash equivalents, and restricted cash		138	663
Cash, cash equivalents, and restricted cash at beginning of period		1,948	742
Cash, cash equivalents, and restricted cash at end of period		2,086	1,405
Supplemental information:
Cash paid for interest		206	370
Cash paid for income taxes		336	10
Non-cash investing and financing activities:
Securitization of residential mortgage loans to mortgage-backed securities available for sale		66	42
Transfer of loans from held for investment to held for sale		48
Transfer of loans from held for sale to held for investment		94
Shares issued for restricted stock awards		$ 28	$ 22

[1] Includes $10 million and $9 million of amortization of operating lease right-of-use assets for the six months ende

[2] Includes $10 million and $9 million of amortization of operating lease liability for the six months ende