Fair Value (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis

(In millions)	December 31, 2017
	Level 1		Level 2		Level 3		Total
ASSETS
Investment securities:
Available-for-sale:
U.S. Treasury, agencies and corporations	$	25	$	13,706	$	—	$	13,731
Municipal securities			1,334				1,334
Other debt securities			24				24
Money market mutual funds and other	71		1				72
Total Available-for-sale	96		15,065		—		15,161
Trading account			148				148
Other noninterest-bearing investments:
Bank-owned life insurance			507				507
Private equity investments					95		95
Other assets:
Agriculture loan servicing and interest-only strips					18		18
Deferred compensation plan assets	102						102
Derivatives:
Interest rate related and other			1				1
Interest rate swaps for customers			28				28
Foreign currency exchange contracts	9						9
Total Assets	$	207	$	15,749	$	113	$	16,069
LIABILITIES
Securities sold, not yet purchased	$	95	$	—	$	—	$	95
Other liabilities:
Deferred compensation plan obligations	102						102
Derivatives:
Interest rate swaps for customers			33				33
Foreign currency exchange contracts	7						7
Total Liabilities	$	204	$	33	$	—	$	237

(In millions)	December 31, 2016
	Level 1		Level 2		Level 3		Total
ASSETS
Investment securities:
Available-for-sale:
U.S. Treasury, agencies and corporations	$	—	$	12,009	$	—	$	12,009
Municipal securities			1,154				1,154
Other debt securities			24				24
Money market mutual funds and other	184		1				185
Total Available-for-sale	184		13,188		—		13,372
Trading account			115				115
Other noninterest-bearing investments:
Bank-owned life insurance			497				497
Private equity investments 1	18				73		91
Other assets:
Agriculture loan servicing and interest-only strips					20		20
Deferred compensation plan assets	91						91
Derivatives:
Interest rate related and other			4				4
Interest rate swaps for customers			49				49
Foreign currency exchange contracts	11						11
Total Assets	$	304	$	13,853	$	93	$	14,250
LIABILITIES
Securities sold, not yet purchased	$	25	$	—	$	—	$	25
Other liabilities:
Deferred compensation plan obligations	91						91
Derivatives:
Interest rate related and other			1				1
Interest rate swaps for customers			49				49
Foreign currency exchange contracts	9						9
Total Liabilities	$	125	$	50	$	—	$	175

¹The level 1 PEIs amount relates to the portion of our SBIC investments that are now publicly traded.

Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis Using Level 3 Inputs

	Level 3 Instruments
	December 31, 2017						December 31, 2016
(In millions)	Private equity investments			Ag loan svcg and int-only strips			Private equity investments			Ag loan svcg and int-only strips
Balance at beginning of year	$	73		$	20		$	58		$	14
Securities gains, net	7			—			6			—
Other noninterest income	—			(1		)	—			6
Purchases	20			—			10			—
Redemptions and paydowns	(5		)	(1		)	(1		)	—
Balance at end of year	$	95		$	18		$	73		$	20

Schedule Of Realized Gains (Losses) Using Level 3 Inputs

(In millions)	Year Ended December 31,
	2017		2016
Equity securities gains, net	$	3	$	6

Schedule Of Assets With Fair Value Changes On Nonrecurring Basis

(In millions)	Fair value at December 31, 2017								Gains (losses) from fair value changes Year Ended December 31, 2017
	Level 1		Level 2		Level 3		Total
ASSETS
Private equity investments, carried at cost	$	—	$	—	$	1	$	1	$	(1	)
Impaired loans	—		9		—		9		(5		)
Other real estate owned	—		—		—		—		—
Total	$	—	$	9	$	1	$	10	$	(6	)

(In millions)	Fair value at December 31, 2016								Gains (losses) from fair value changes Year Ended December 31, 2016
	Level 1		Level 2		Level 3		Total
ASSETS
Private equity investments, carried at cost	$	—	$	—	$	1	$	1	$	(1	)
Impaired loans	—		52		—		52		(36		)
Other real estate owned	—		1		—		1		(2		)
Total	$	—	$	53	$	1	$	54	$	(39	)

Schedule Of Carrying Values And Estimated Fair Values Of Financial Instruments

	December 31, 2017					December 31, 2016
(Dollar amounts in millions)	Carrying value		Estimated fair value		Level	Carrying value		Estimated fair value		Level
Financial assets:
Held-to-maturity investment securities	$	770	$	762	2	$	868	$	850	2
Loans and leases (including loans held for sale), net of allowance	44,306		44,226		3	42,254		42,111		3
Financial liabilities:
Time deposits	3,115		3,099		2	2,757		2,744		2
Other short-term borrowings	3,600		3,600		2	500		500		2
Long-term debt (less fair value hedges)	383		402		2	535		552		2

	December 31, 2017
(In millions)								Gross amounts not offset in the balance sheet
Description	Gross amounts recognized		Gross amounts offset in the balance sheet			Net amounts presented in the balance sheet		Financial instruments			Cash collateral received/pledged			Net amount
Assets:
Federal funds sold and security resell agreements	$	809	$	(295	)	$	514	$	—		$	—		$	514
Derivatives (included in other assets)	38		—			38		(21		)	(1		)	16
Total assets	$	847	$	(295	)	$	552	$	(21	)	$	(1	)	$	530
Liabilities:
Federal funds and other short-term borrowings	$	5,271	$	(295	)	$	4,976	$	—		$	—		$	4,976
Derivatives (included in other liabilities)	40		—			40		(21		)	(6		)	13
Total liabilities	$	5,311	$	(295	)	$	5,016	$	(21	)	$	(6	)	$	4,989

	December 31, 2016
(In millions)							Gross amounts not offset in the balance sheet
Description	Gross amounts recognized		Gross amounts offset in the balance sheet		Net amounts presented in the balance sheet		Financial instruments			Cash collateral received/pledged			Net amount
Assets:
Federal funds sold and security resell agreements	$	568	$	—	$	568	$	—		$	—		$	568
Derivatives (included in other assets)	64		—		64		(17		)	—			47
Total assets	$	632	$	—	$	632	$	(17	)	$	—		$	615
Liabilities:
Federal funds and other short-term borrowings	$	827	$	—	$	827	$	—		$	—		$	827
Derivatives (included in other liabilities)	59		—		59		(17		)	(17		)	25
Total liabilities	$	886	$	—	$	886	$	(17	)	$	(17	)	$	852