Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Interest Income
Loans	$ 844		$ 738		$ 2,426	$ 2,170
Securities	168		149		491	407
Securities borrowed or purchased under resale agreements	171		97		454	243
Trading assets	109		89		308	245
Other	25		10		58	28
Total interest income	1,317		1,083		3,737	3,093
Interest Expense
Deposits	124		62		278	169
Commercial paper and other short-term borrowings	46		17		121	35
Long-term debt	92		66		266	183
Securities loaned or sold under repurchase agreements	193		102		509	245
Trading liabilities	30		20		81	56
Total interest expense	485		267		1,255	688
Net Interest Income	832	[1]	816	[1]	2,482	2,405
(Reversal of) provision for credit losses	64	[1]	18	[1]	43	(34)
Net interest income after (reversal of) provision for credit losses	768		798		2,439	2,439
Noninterest Income
Service charges on deposit accounts	44		47		134	142
Trust and investment management fees	30		32		89	91
Trading Gain (Loss)	(5)		(3)
Trading account activities					(13)	(10)
Securities gains, net	1		6		4	15
Credit facility fees	23		26		69	75
Brokerage commissions and fees					55	52
Card processing fees, net	12		10		37	34
Investment Banking Revenue	108		106
Investment banking and syndication fees	18		16		285	288
Fees from affiliates	306		209		881	639
Other, net	89		66		63	166
Total noninterest income	626		515		1,604	1,492
Noninterest Expense
Salaries and employee benefits	652		621		2,000	1,881
Net occupancy and equipment	89		87		264	256
Professional and outside services	110		101		356	316
Software	73		49		213	142
Regulatory assessments	24		22		69	61
Intangible asset amortization	6		8		20	22
Other	105		94		304	267
Total noninterest expense	1,059	[1]	982	[1]	3,226	2,945
Income before income taxes and including noncontrolling interests	335	[1]	331	[1]	817	986
Income tax expense (benefit)	35	[1]	109	[1]	21	255
Net Income Including Noncontrolling Interests	300	[1]	222	[1]	796	731
Deduct: Net loss from noncontrolling interests	6	[1]	10	[1]	20	25
Net Income Attributable to MUAH	$ 306	[1]	$ 232	[1]	$ 816	$ 756

[1] As of and for the Three Months Ended September 30, 2018:(Dollars in millions) Regional Bank U.S. Wholesale & Investment Banking Transaction Banking MUSA Other MUFG Americas Holdings CorporationResults of operations Net interest income $553 $104 $66 $52 $57 $832Noninterest income 111 103 15 94 303 626Total revenue 664 207 81 146 360 1,458Noninterest expense 518 106 65 121 249 1,059(Reversal of) provision for credit losses 45 27 (3) — (5) 64Income (loss) before income taxes and including noncontrolling interests 101 741925 116335Income tax expense (benefit) (1) 17 (3) 5 6 10 35Net income (loss) including noncontrolling interests 84 77 14 19 106 300Deduct: net (income) loss from noncontrolling interests — — — — 6 6Net income (loss) attributable to MUAH $84 $77 $14 $19 $112 $306 Total assets, end of period $71,501 $19,467 $882 $33,366 $35,820 $161,036