Commercial Paper and Other Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2018

Short-term Debt [Abstract]

Summary of Commercial Paper and Other Short-Term Borrowings

The following table is a summary of the Company's commercial paper and other short-term borrowings:

(Dollars in millions)	December 31, 2018		December 31, 2017
Debt issued by MUB
Commercial paper, with a weighted average interest rate of 2.39% and 1.26% at December 31, 2018 and December 31, 2017, respectively	$	382	$	347
Federal Home Loan Bank advances, with a weighted average interest rate of 2.52% and 1.42% at December 31, 2018 and December 31, 2017, respectively	7,800		5,750
Total debt issued by MUB	8,182		6,097
Debt issued by other MUAH subsidiaries
Short-term debt due to MUFG Bank, Ltd., with weighted average interest rates of 3.01% and 1.88% at December 31, 2018 and December 31, 2017, respectively	145		168
Short-term debt due to affiliates, with weighted average interest rates of (-0.07)% and (-0.09)% at December 31, 2018 and December 31, 2017, respectively	936		801
Total debt issued by other MUAH subsidiaries	1,081		969
Total commercial paper and other short-term borrowings	$	9,263	$	7,066