Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Summary of Long-Term Debt

Long-term debt consists of borrowings having an original maturity of one year or more. The following is a summary of the Company's long-term debt:

(Dollars in millions)	December 31, 2018		December 31, 2017
Debt issued by MUAH
Senior debt:
Floating rate senior notes due February 2018. These notes, which bore interest at 0.57% above 3-month LIBOR, had a rate of 1.97% at December 31, 2017	$	—	$	250
Fixed rate 1.625% notes due February 2018	—		450
Fixed rate 2.25% notes due February 2020	—		998
Fixed rate 3.50% notes due June 2022	398		398
Fixed rate 3.00% notes due February 2025	397		496
Senior debt due to MUFG Bank, Ltd:
Floating rate debt due March 2020. This note, which bore interest at 0.86% above 3-month LIBOR, had a rate of 2.45% at December 31, 2017	—		545
Floating rate debt due September 2020. This note, which bore interest at 0.85% above 3-month LIBOR, had a rate of 2.54% at December 31, 2017	—		3,500
Floating rate debt due December 2021. This note, which bears interest at 0.81% above 3-month LIBOR, had a rate of 3.58% at December 31, 2018	1,625		—
Floating rate debt due December 2022. This note, which bears interest at 0.90% above 3-month LIBOR, had a rate of 3.67% at December 31, 2018	3,250		—
Floating rate debt due December 2023. This note, which bears interest at 0.99% above 3-month LIBOR, had a rate of 3.76% at December 31, 2018	1,625		—
Floating rate debt due December 2023. This note, which bears interest at 0.76% above 3-month EURIBOR, had a rate of 0.76% at December 31, 2018 and at December 31, 2017	24		24
Subordinated debt due to MUFG Bank, Ltd:
Floating rate subordinated debt due December 2023. This note, which bore interest at 1.38% above 3-month LIBOR, had a rate of 3.07% at December 31, 2017	—		300
Junior subordinated debt payable to trusts:
Floating rate note due September 2036. This note had an interest rate of 4.49% at December 31, 2018 and 3.29% at December 31, 2017	36		36
Total debt issued by MUAH	7,355		6,997
Debt issued by MUB
Senior debt:
Fixed rate FHLB of San Francisco advances due between January 2019 and December 2023. These notes bear a combined weighted average rate of 2.66% at December 31, 2018 and 1.51% at December 31, 2017	9,100		1,500
Fixed rate 2.625% notes due September 2018	—		1,000
Fixed rate 2.25% notes due May 2019	498		497
Subordinated debt due to MUFG Bank, Ltd:
Floating rate subordinated debt due June 2023. This note, which bore interest at 1.20% above 3-month LIBOR, had a rate of 2.89% at December 31, 2017	—		750
Other	34		63
Total debt issued by MUB	9,632		3,810
Debt issued by other MUAH subsidiaries
Senior debt due to MUFG Bank, Ltd:
Various floating rate borrowings due between December 2020 and May 2021. These notes, which bear interest above 3-month LIBOR had a weighted average interest rate of 2.80% at December 31, 2018 and 1.78% at December 31, 2017	250		291
Various fixed rate borrowings due between February 2019 and May 2024 with a weighted average interest rate of 1.82% (between 0.14% and 2.44%) at December 31, 2018 and 2.12% (between 1.37% and 2.65%) at December 31, 2017	244		339
Subordinated debt due to Affiliate:
Floating rate borrowings due March 2019. These notes, which bear interest above 6-month LIBOR had an interest rate of 4.13% at December 31, 2018 and 2.95% (between 2.88% and 3.04%) at December 31, 2017	75		185

Non-recourse debt due to MUFG Bank, Ltd:
Various floating rate non-recourse borrowings due between February 2019 and December 2021. These notes, which bear interest above 1- or 3-month LIBOR had a weighted average interest rate of 4.09% (between 2.75% and 4.17%) at December 31, 2018 and 3.07% (between 1.49% and 5.58%) at December 31, 2017	53		79
Fixed rate non-recourse borrowings due between January 2019 and July 2023 which had an interest rate of 3.05% at December 31, 2018 and 3.27% at December 31, 2017	187		240
Other non-recourse debt:
Various floating rate non-recourse borrowings due between February 2019 and May 2019. These notes, which bear interest above 1- or 3-month LIBOR had a weighted average interest rate of 4.21% (between 4.17% and 4.48%) at December 31, 2018 and 2.88% (between 2.50% and 3.54%) at December 31, 2017	89		185
Fixed rate non-recourse borrowings due December 2026 which had an interest rate of 5.34% at December 31, 2018 and December 31, 2017	33		36
Total debt issued by other MUAH subsidiaries	931		1,355
Total long-term debt	$	17,918	$	12,162