Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income before noncontrolling interests	$ 2,073	$ 1,294	$ 1,185
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	123	220	107
Gains on investment securities, net	(761)	(421)	(135)
Distributions of earnings from non-marketable and other equity securities	201	86	95
Depreciation and amortization	151	101	83
Amortization of premiums and discounts on investment securities, net	451	75	16
Amortization of share-based compensation	136	84	67
Amortization of deferred loan fees	(269)	(174)	(155)
Deferred income tax (benefit) expense	(8)	7	(3)
Excess tax benefit from exercise of stock options and vesting of restricted shares	(40)	(6)	(10)
Losses from the write-off of premises and equipment and right-of-use assets	39	30	5
Other losses	0	0	9
Changes in other assets and liabilities:
Accrued interest receivable and payable, net	(185)	(26)	(24)
Accounts receivable and payable, net	17	19	(17)
Income tax receivable and payable, net	(122)	98	(12)
Accrued compensation	332	191	(15)
Foreign exchange spot contracts, net	(16)	(21)	60
Proceeds from termination of interest rate swaps	0	228	0
Other, net	(280)	(289)	(75)
Net cash provided by operating activities	1,812	1,446	1,164
Cash flows from investing activities:
Purchases of available-for-sale securities	(12,147)	(23,208)	(9,872)
Proceeds from sales of available-for-sale securities	1,591	2,654	2,189
Proceeds from maturities and paydowns of available-for-sale securities	4,768	4,184	1,643
Purchases of held-to-maturity securities	(85,519)	(6,778)	(493)
Proceeds from maturities and paydowns of held-to-maturity securities	13,428	4,036	2,125
Purchases of non-marketable and other equity securities	(365)	(201)	(136)
Proceeds from sales and distributions of capital of non-marketable and other equity securities	666	148	114
Net increase in loans	(13,726)	(11,927)	(4,775)
Purchases of premises and equipment	(113)	(87)	(65)
Business acquisitions, net	1,081	(27)	(102)
Net cash used for investing activities	(90,336)	(31,206)	(9,372)
Cash flows from financing activities:
Net increase in deposits	78,238	40,224	12,429
Net increase (decrease) in short-term borrowings	57	3	(614)
Principal payments of long-term debt	0	0	(359)
Proceeds from issuance of long-term debt	1,636	495	0
(Distributions to noncontrolling interests), net of contributions from noncontrolling interests	(80)	(23)	(51)
Net proceeds from the issuance of preferred stock	3,306	0	340
Payment of preferred stock dividends	(63)	(17)	0
Common stock repurchase	0	(60)	(352)
Proceeds from issuance of common stock, ESPP and ESOP	2,374	31	25
Net cash provided by financing activities	85,468	40,653	11,418
Net (decrease) increase in cash and cash equivalents	(3,056)	10,893	3,210
Cash and cash equivalents at beginning of period	17,675	6,782	3,572
Cash and cash equivalents at end of period	14,619	17,675	6,782
Cash paid during the period for:
Interest	93	84	218
Income taxes	739	299	422
Noncash items during the period:
Changes in unrealized gains and losses on available-for-sale securities, net of tax	(488)	394	140
Distributions of stock from investments	72	12	9
Transfers from AFS securities to HTM	8,953	0	0
Equity warrant assets
Adjustments to reconcile net income to net cash provided by operating activities:
Changes in fair value of derivatives	(26)	(2)	2
Derivative
Adjustments to reconcile net income to net cash provided by operating activities:
Changes in fair value of derivatives	$ (4)	$ (48)	$ (19)