Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities
Net income	$ 956,002	$ 845,770
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	77,000	78,000
Depreciation and amortization of premises and equipment	101,983	54,092
Amortization of capitalized servicing rights	34,017	24,207
Amortization of core deposit and other intangible assets	10,097	13,020
Provision for deferred income taxes	15,817	(123,980)
Asset write-downs	52,324	5,237
Net gain on sales of assets	(10,521)	(8,738)
Net change in accrued interest receivable, payable	5,650	5,759
Net change in other accrued income and expense	(144,714)	255,124
Net change in loans originated for sale	(218,925)	(756,003)
Net change in trading account assets and liabilities	(398,552)	128,754
Net cash provided by operating activities	480,178	521,242
Cash flows from investing activities
Proceeds from sales of investment securities Available for sale		418
Proceeds from sales of investment securities equity and other	580,489	505,841
Proceeds from maturities of investment securities Available for sale	1,506,273	950,071
Proceeds from maturities of investment securities Held to maturity	213,086	247,385
Purchases of investment securities Available for sale	(2,694)	(5,799)
Purchases of investment securities Held to maturity	(495,277)
Purchases of investment securities equity and other	(461,749)	(520,040)
Net (increase) decrease in loans and leases	(1,259,545)	859,071
Net increase in interest-bearing deposits at banks	(686,556)	(1,591,082)
Capital expenditures, net	(82,657)	(37,116)
Net decrease in loan servicing advances	23,663	262,947
Other, net	84,108	(8,708)
Net cash provided (used) by investing activities	(580,859)	662,988
Cash flows from financing activities
Net increase (decrease) in deposits	1,525,777	(3,157,898)
Net increase in short-term borrowings	213,012	3,064,317
Proceeds from long-term borrowings		999,594
Payments on long-term borrowings	(876,581)	(706,370)
Purchases of treasury stock	(767,612)	(1,196,062)
Dividends paid — common	(274,037)	(227,565)
Dividends paid — preferred	(36,260)	(36,260)
Other, net	(17,446)	24,220
Net cash used by financing activities	(233,147)	(1,236,024)
Net decrease in cash, cash equivalents and restricted cash	(333,828)	(51,794)
Cash, cash equivalents and restricted cash at beginning of period	1,605,439	1,420,888
Cash, cash equivalents and restricted cash at end of period	1,271,611	1,369,094
Supplemental disclosure of cash flow information
Interest received during the period	2,444,623	2,210,063
Interest paid during the period	361,179	218,731
Income taxes paid during the period	243,404	175,619
Supplemental schedule of noncash investing and financing activities
Real estate acquired in settlement of loans	39,456	36,418
Securitization of residential mortgage loans allocated to Available-for-sale investment securities	5,379	10,303
Securitization of residential mortgage loans allocated to capitalized servicing rights	83	$ 150
Adoption of lease accounting standard - Right-of-use assets	393,877
Adoption of lease accounting standard - Other liabilities	398,810
Additions to right-of-use assets under operating leases	$ 44,928