Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities
Net income	$ 905,318	$ 509,876
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	(40,000)	575,000
Depreciation and amortization of premises and equipment	113,459	108,748
Amortization of capitalized servicing rights	40,147	37,971
Amortization of core deposit and other intangible assets	5,475	7,826
Provision for deferred income taxes	55,153	(90,093)
Asset write-downs	3,243	15,626
Net gain on sales of assets	(12,845)	(5,808)
Net change in accrued interest receivable, payable	(1,048)	(48,790)
Net change in other accrued income and expense	(50,200)	6,403
Net change in loans originated for sale	172,617	(220,368)
Net change in trading account assets and liabilities	340,392	(765,314)
Net cash provided by operating activities	1,531,711	131,077
Cash flows from investing activities
Proceeds from sales of investment securities equity and other	5,268	54,232
Proceeds from maturities of investment securities Available for sale	811,795	662,253
Proceeds from maturities of investment securities Held to maturity	335,976	502,093
Purchases of investment securities Available for sale	(2,137)	(4,052)
Purchases of investment securities Held to maturity	(305,633)	(8,995)
Purchases of investment securities equity and other	(19,299)	(20,575)
Net (increase) decrease in loans and leases	1,172,249	(6,713,727)
Net increase in interest-bearing deposits at banks	(10,201,014)	(13,698,187)
Capital expenditures, net	(44,459)	(93,651)
Net (increase) decrease in loan servicing advances	(417,629)	178,984
Other, net	(317,489)	197,377
Net cash used by investing activities	(8,982,372)	(18,944,248)
Cash flows from financing activities
Net increase in deposits	8,463,034	20,199,033
Net increase (decrease) in short-term borrowings	31,753	(10,065)
Payments on long-term borrowings	(852,992)	(754,425)
Purchases of treasury stock		(373,750)
Dividends paid — common	(283,791)	(284,690)
Dividends paid — preferred	(34,100)	(34,156)
Other, net	(15,518)	(10,266)
Net cash provided by financing activities	7,308,386	18,731,681
Net decrease in cash, cash equivalents and restricted cash	(142,275)	(81,490)
Cash, cash equivalents and restricted cash at beginning of period	1,552,743	1,436,305
Cash, cash equivalents and restricted cash at end of period	1,410,468	1,354,815
Supplemental disclosure of cash flow information
Interest received during the period	1,976,059	2,156,881
Interest paid during the period	79,841	223,874
Income taxes paid during the period	204,259	61,759
Supplemental schedule of noncash investing and financing activities
Real estate acquired in settlement of loans	3,968	17,885
Additions to right-of-use assets under operating leases	$ 18,182	$ 30,585