Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest Income
Loans	$ 3,625	$ 3,303	$ 2,892
Securities	619	665	564
Securities borrowed or purchased under resale agreements	765	652	347
Trading assets	360	415	326
Other	180	90	50
Total interest income	5,549	5,125	4,179
Interest Expense
Deposits	826	441	241
Commercial paper and other short-term borrowings	202	168	58
Long-term debt	497	365	250
Securities loaned or sold under repurchase agreements	830	734	353
Trading liabilities	101	110	73
Total interest expense	2,456	1,818	975
Net Interest Income	3,093	3,307	3,204
(Reversal of) provision for credit losses	252	106	(103)
Net interest income after (reversal of) provision for credit losses	2,841	3,201	3,307
Noninterest Income
Service charges on deposit accounts	166	179	188
Trust and investment management fees	117	118	121
Trading account activities	70	(24)	(5)
Securities gains, net	39	8	17
Credit facility fees	98	90	98
Brokerage commissions and fees	74	73	69
Card processing fees, net	56	50	47
Investment banking and syndication fees	433	355	369
Fees from affiliates	1,439	1,213	866
Other, net	213	115	240
Total noninterest income	2,705	2,177	2,010
Noninterest Expense
Salaries and employee benefits	2,687	2,616	2,495
Net occupancy and equipment	431	367	357
Professional and outside services	651	487	439
Software	313	287	192
Regulatory assessments	63	85	82
Intangible asset amortization	34	26	30
Goodwill, Impairment Loss	1,614	0	0
Other	422	409	389
Total noninterest expense	6,215	4,277	3,984
Income before income taxes and including noncontrolling interests	(669)	1,101	1,333
Income tax expense (benefit)	82	52	299
Net (Loss) Income Including Noncontrolling Interests	(751)	1,049	1,034
Deduct: Net loss (income) from noncontrolling interests	17	24	43
Net (Loss) Income Attributable to MUAH	$ (734)	$ 1,073	$ 1,077