Borrowings and Contractual Commitments (Tables)

12 Months Ended

Dec. 31, 2018

Short-term Debt [Line Items]

Schedule of Short-term Debt [Table Text Block]

Short-term borrowings at December 31 consisted of the following:

	2018				2017
(Dollars in millions)	Balance		Interest Rate		Balance		Interest Rate
Funds purchased		$2,141	2.40	%		$2,561	1.33	%
Securities sold under agreements to repurchase	1,774		2.58		1,503		1.39
Other short-term borrowings:
FHLB advances	4,000		2.53		—
Dealer collateral	503		2.40		367		1.33
Master notes	354		1.40		350		0.66
Total other short-term borrowings	4,857		2.44		717		1.00
Total short-term borrowings		$8,772	2.46	%		$4,781	1.30	%

Debt Instrument [Line Items]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt at December 31 consisted of the following:

	2018				2017
(Dollars in millions)	Maturity Date(s)	Interest Rate(s)	Balance		Balance
Parent Company:
Senior, fixed rate	2019 - 2028	2.50% - 6.00%		$3,467		$3,353
Senior, floating rate	2019	2.69	51		51
Subordinated, fixed rate	2026	6.00	200		200
Junior subordinated, floating rate	2027 - 2028	3.29 - 3.44	627		628
Structured notes 1	2019 - 2026		200		242
Total			4,545		4,474
Less: Debt issuance costs			9		8
Total Parent Company debt			4,536		4,466
Subsidiaries 2:
Senior, fixed rate 3	2019 - 2058	0.69 - 9.55	6,238		3,609
Senior, floating rate	2020 - 2043	1.04 - 3.15	1,085		512
Senior, fixed-to-floating rate	2021 - 2024	2.59 - 3.69	2,364		—
Subordinated, fixed rate	2020 - 2026	3.30 - 5.40	864		1,206
Total			10,551		5,327
Less: Debt issuance costs			15		8
Total subsidiaries debt			10,536		5,319
Total long-term debt 4				$15,072		$9,785

¹ Consists of notes with various terms that include fixed or floating interest, or returns that are linked to an equity index.

² 82% and 77% of total subsidiary debt was issued by the Bank as of December 31, 2018 and 2017, respectively.

³ Includes leases and other obligations that do not have a stated interest rate.

⁴ Includes $289 million and $530 million of long-term debt measured at fair value at December 31, 2018 and 2017, respectively.

Schedule of Maturities of Long-term Debt [Table Text Block]

Maturities of long-term debt at December 31, 2018 were as follows:

(Dollars in millions)	Parent Company		Subsidiaries
2019		$792		$1,026
2020	—		1,496
2021	1,039		1,652
2022	984		1,800
2023	12		1,095
Thereafter	1,718		3,482
Total maturities	4,545		10,551
Less: Debt issuance costs	9		15
Total long-term debt		$4,536		$10,536

Schedule of Long-Term Debt Issuances [Table Text Block]

The Company’s issuances of long-term debt during 2018 are summarized in the following table:

2018 Debt Issuances	Principal Amount (Dollars in millions)
Parent Company:
7-year fixed rate senior notes		$850
Subsidiaries:
3-year fixed-to-floating rate senior notes	750
3-year fixed-to-floating rate senior notes	600
7-year fixed rate senior notes	500
6-year fixed-to-floating rate senior notes	500
5-year fixed rate senior notes	500
4-year fixed-to-floating rate senior notes	500
4-year floating rate senior notes	300
3-year floating rate senior notes	300
Total		$4,800