Fair Value (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value [Abstract]

Fair Value Measurements - Recurring Basis Summary

Table 52: Fair Value Measurements – Recurring Basis Summary

	December 31, 2017								December 31, 2016
In millions	Level 1		Level 2		Level 3		Total Fair Value		Level 1		Level 2		Level 3		Total Fair Value
Assets
Residential mortgage loans held for sale			$	829	$	3	$	832			$	1,008	$	2	$	1,010
Commercial mortgage loans held for sale			723		107		830						1,400		1,400
Securities available for sale
U.S. Treasury and government agencies	$	14,088	433				14,521		$	12,572	602				13,174
Residential mortgage-backed
Agency			25,406				25,406				26,128				26,128
Non-agency			97		2,661		2,758				112		3,254		3,366
Commercial mortgage-backed
Agency			1,904				1,904				2,119				2,119
Non-agency			2,613				2,613				4,025				4,025
Asset-backed			5,065		332		5,397				5,565		403		5,968
Other debt			4,347		87		4,434				4,657		66		4,723
Total debt securities	14,088		39,865		3,080		57,033		12,572		43,208		3,723		59,503
Other	524		61				585		541		60				601
Total securities available for sale	14,612		39,926		3,080		57,618		13,113		43,268		3,723		60,104
Loans			571		298		869				558		335		893
Equity investments (a)					1,036		1,265						1,331		1,381
Residential mortgage servicing rights					1,164		1,164						1,182		1,182
Commercial mortgage servicing rights					668		668						576		576
Trading securities (b)	1,243		1,670		2		2,915		1,458		1,169		2		2,629
Financial derivatives (b) (c)			2,864		10		2,874		10		4,566		40		4,616
Other assets	278		253		107		638		266		312		239		817
Total assets	$	16,133	$	46,836	$	6,475	$	69,673	$	14,847	$	50,881	$	8,830	$	74,608
Liabilities
Other borrowed funds	$	1,079	$	254	$	11	$	1,344	$	799	$	161	$	10	$	970
Financial derivatives (c) (d)			2,369		487		2,856		1		3,424		414		3,839
Other liabilities					33		33						9		9
Total liabilities	$	1,079	$	2,623	$	531	$	4,233	$	800	$	3,585	$	433	$	4,818

(a) Certain investments that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented on the Consolidated Balance Sheet.

(b) Included in Other assets on the Consolidated Balance Sheet.

(c) Amounts at December 31, 2017 and December 31, 2016, are presented gross and are not reduced by the impact of legally enforceable master netting agreements that allow us to net positive and negative positions and cash collateral held or placed with the same counterparty. See Note 13Financial Derivatives for additional information related to derivative offsetting.

(d) Included in Other liabilities on the Consolidated Balance Sheet.

Reconciliation of Level 3 Assets and Liabilities

Reconciliations of assets and liabilities measured at fair value on a recurring basis using Level 3 inputs for 2017 and 2016 follow.

Table 53: Reconciliation of Level 3 Assets and Liabilities

Year Ended December 31, 2017

			Total realized / unrealized gains or losses for the  period (a)																								Unrealized gains / losses on assets and liabilities held on Consolidated Balance Sheet at Dec. 31, 2017 (a) (b)
Level 3 Instruments Only In millions	Fair Value Dec. 31, 2016		Included in Earnings			Included in Other comprehensive income			Purchases		Sales			Issuances		Settlements			Transfers into Level 3		Transfers out of Level 3				Fair Value Dec. 31, 2017
Assets
Residential mortgage loans held for sale	$	2							$	8	$	(1	)						$	10	$	(16	)	(c)	$	3
Commercial mortgage loans held for sale	1,400		$	81							(5,278		)	$	4,885	$	(258	)			(723		)	(d)	107		$	4
Securities available for sale
Residential mortgage- backed non-agency	3,254		77				$	137			(33		)			(774		)							2,661		(1		)
Commercial mortgage- backed non-agency			12								(12		)
Asset-backed	403		12				22				(25		)			(80		)							332
Other debt	66						19		13		(1		)			(10		)							87
Total securities available for sale	3,723		101				178		13		(71		)			(864		)							3,080		(1		)
Loans	335								97		(28		)			(68		)	13		(51		)	(c)	298		(7		)
Equity investments	1,331		239						214		(565		)								(183		)	(e)	1,036		145
Residential mortgage servicing rights	1,182		(83		)				185					55		(175		)							1,164		(79		)
Commercial mortgage servicing rights	576		46						69					88		(111		)							668		45
Trading securities	2																								2
Financial derivatives	40		39						3							(67		)			(5		)		10		67
Other assets	239		23													(155		)							107		24
Total assets	$	8,830	$	446			$	178	$	589	$	(5,943	)	$	5,028	$	(1,698	)	$	23	$	(978	)		$	6,475	$	198
Liabilities
Other borrowed funds	$	10												$	72	$	(71	)							$	11
Financial derivatives	414		$	293							$	3				(221		)			$	(2	)		487		$	297
Other liabilities	9		25											173		(174		)							33		26
Total liabilities	$	433	$	318							$	3		$	245	$	(466	)			$	(2	)		$	531	$	323
Net gains (losses)			$	128		(f)																					$	(125	)	(g)

Year Ended December 31, 2016

			Total realized / unrealized gains or losses for the  period (a)																										Unrealized gains / losses on assets and liabilities held on Consolidated Balance Sheet at Dec. 31, 2016 (a) (b)
Level 3 Instruments Only In millions	Fair Value Dec. 31, 2015		Included in Earnings			Included in Other comprehensive income				Purchases		Sales			Issuances		Settlements			Transfers into Level 3			Transfers out of Level 3			(c)	Fair Value Dec. 31, 2016
Assets
Residential mortgage loans held for sale	$	5								$	10	$	(3	)						$	10		$	(20	)		$	2
Commercial mortgage loans held for sale	641		$	79								(3,810		)	$	4,515	$	(25	)								1,400		$	(3	)
Securities available for sale
Residential mortgage- backed non-agency	4,008		75				$	16				(60		)			(785		)								3,254		(2		)
Asset-backed	482		13				(3		)								(89		)								403
Other debt	45		1				28			12		(17		)			(3		)	2			(2		)		66
Total securities available for sale	4,535		89				41			12		(77		)			(877		)	2			(2		)		3,723		(2		)
Loans	340		8							126		(22		)			(78		)	15			(54		)		335		2
Equity investments	1,098		148							269		(418		)						235		(e)	(1		)		1,331		127
Residential mortgage servicing rights	1,063		37							188					62		(168		)								1,182		39
Commercial mortgage servicing rights	526		45							36					61		(92		)								576		45
Trading securities	3																(1		)								2
Financial derivatives	31		115							2							(108		)								40		102
Other assets	364		15				(2		)								(138		)								239		13
Total assets	$	8,606	$	536			$	39		$	643	$	(4,330	)	$	4,638	$	(1,487	)	$	262		$	(77	)		$	8,830	$	323
Liabilities
Other borrowed funds	$	12													$	87	$	(89	)								$	10
Financial derivatives	473		$	127								$	4				(190		)								414		$	129
Other liabilities	10		(9		)										132		(124		)								9
Total liabilities	$	495	$	118								$	4		$	219	$	(403	)								$	433	$	129
Net gains (losses)			$	418		(f)																							$	194		(g)

(a) Losses for assets are bracketed while losses for liabilities are not.

(b) The amount of the total gains or losses for the period included in earnings that is attributable to the change in unrealized gains or losses related to those assets and liabilities held at the end of the reporting period.

(c) Transfers out of Level 3 primarily reflect the reclassification of residential mortgage loans held for sale to held for investment and the transfer of residential mortgage loans to OREO.

(d) Reflects a transfer from Level 3 to Level 2 due to an unobservable valuation input that was deemed to be not significant.

(e) Reflects transfers into and out of Level 3 associated with changes in valuation methodology for certain equity investments subject to the Volcker Rule provisions of the Dodd-Frank Act.

(f) Net gains (losses) realized and unrealized included in earnings related to Level 3 assets and liabilities included amortization and accretion. The amortization and accretion amounts were included in Interest income on the Consolidated Income Statement and the remaining net gains (losses) realized and unrealized were included in Noninterest income on the Consolidated Income Statement.

(g) Net unrealized gains (losses) related to assets and liabilities held at the end of the reporting period were included in Noninterest income on the Consolidated Income Statement.

Fair Value Measurements - Recurring Quantitative Information

Quantitative information about the significant unobservable inputs within Level 3 recurring assets and liabilities follows.

Table 54: Fair Value Measurements – Recurring Quantitative Information

December 31, 2017

Level 3 Instruments Only Dollars in millions	Fair Value			Valuation Techniques	Unobservable Inputs	Range (Weighted Average)
Commercial mortgage loans held for sale	$	107		Discounted cash flow	Spread over the benchmark curve (a)	525bps - 1,470bps (1,020bps)
Residential mortgage-backed non-agency securities	2,661			Priced by a third-party vendor using a discounted cash flow pricing model	Constant prepayment rate (CPR)	1.0% - 31.6% (10.8%)
					Constant default rate (CDR)	0.1% - 18.8% (5.4%)
					Loss severity	15.0% - 100.0% (51.5%)
					Spread over the benchmark curve (a)	190bps weighted average
Asset-backed securities	332			Priced by a third-party vendor using a discounted cash flow pricing model	Constant prepayment rate (CPR)	1.0% - 19.0% (7.9%)
					Constant default rate (CDR)	2.0% - 11.8% (5.4%)
					Loss severity	15.0% - 100.0% (68.5%)
					Spread over the benchmark curve (a)	179bps weighted average
Loans	133			Consensus pricing (b)	Cumulative default rate	11.0% - 100.0% (85.7%)
					Loss severity	0.0% - 100.0% (20.6%)
					Discount rate	5.5% - 8.0% (5.7%)
	104			Discounted cash flow	Loss severity	8.0% weighted average
					Discount rate	4.9% weighted average
	61			Consensus pricing (b)	Credit and Liquidity discount	0.0% - 99.0% (61.1%)
Equity investments	1,036			Multiple of adjusted earnings	Multiple of earnings	4.5x - 29.7x (8.3x)
Residential mortgage servicing rights	1,164			Discounted cash flow	Constant prepayment rate (CPR)	0.0% - 36.7% (10.0%)
					Spread over the benchmark curve (a)	390bps - 1,839bps (830bps)
Commercial mortgage servicing rights	668			Discounted cash flow	Constant prepayment rate (CPR)	7.7% - 14.2% (8.5%)
					Discount rate	6.4% - 7.9% (7.8%)
Financial derivatives - Swaps related to sales of certain Visa Class B common shares	(380		)	Discounted cash flow	Estimated conversion factor of Visa Class B shares into Class A shares	163.8% weighted average
					Estimated growth rate of Visa Class A share price	16.0%
					Estimated length of litigation resolution date	Q2 2021
Insignificant Level 3 assets, net of liabilities (c)	58
Total Level 3 assets, net of liabilities (d)	$	5,944

December 31, 2016

Level 3 Instruments Only Dollars in millions	Fair Value			Valuation Techniques	Unobservable Inputs	Range (Weighted  Average)
Commercial mortgage loans held for sale	$	1,400		Discounted cash flow	Spread over the benchmark curve (a)	42bps - 1,725bps (362bps)
					Estimated servicing cash flows	0.0% - 7.3% (1.5%)
Residential mortgage-backed non-agency securities	3,254			Priced by a third-party vendor using a discounted cash flow pricing model	Constant prepayment rate (CPR)	1.0% - 24.2% (7.2%)
					Constant default rate (CDR)	0.0% - 16.7% (5.3%)
					Loss severity	10.0% - 98.5% (53.5%)
					Spread over the benchmark curve (a)	236bps weighted average
Asset-backed securities	403			Priced by a third-party vendor using a discounted cash flow pricing model	Constant prepayment rate (CPR)	1.0% - 16.0% (6.4%)
					Constant default rate (CDR)	2.0% - 13.9% (6.6%)
					Loss severity	24.2% - 100.0% (77.3%)
					Spread over the benchmark curve (a)	278bps weighted average
Loans	141			Consensus pricing (b)	Cumulative default rate	11.0% - 100.0% (86.9%)
					Loss severity	0.0% - 100.0% (22.9%)
					Discount rate	4.7% - 6.7% (5.1%)
	116			Discounted cash flow	Loss severity	8.0% weighted average
					Discount rate	4.2% weighted average
	78			Consensus pricing (b)	Credit and Liquidity discount	0.0% - 99.0% (57.9%)
Equity investments	1,331			Multiple of adjusted earnings	Multiple of earnings	4.5x - 12.0x (7.8x)
				Consensus pricing (b)	Liquidity discount	0.0% - 40.0%
Residential mortgage servicing rights	1,182			Discounted cash flow	Constant prepayment rate (CPR)	0.0% - 36.0% (9.4%)
					Spread over the benchmark curve (a)	341bps - 1,913bps (850bps)
Commercial mortgage servicing rights	576			Discounted cash flow	Constant prepayment rate (CPR)	7.5% - 43.4% (8.6%)
					Discount rate	3.5% - 7.6% (7.5%)
Other assets – BlackRock Series C Preferred Stock	232			Consensus pricing (b)	Liquidity discount	15.0% - 25.0% (20.0%)
Financial derivatives - BlackRock LTIP	(232		)	Consensus pricing (b)	Liquidity discount	15.0% - 25.0% (20.0%)
Financial derivatives - Swaps related to sales of certain Visa Class B common shares	(164		)	Discounted cash flow	Estimated conversion factor of     Class B shares into Class A shares	164.4% weighted average
					Estimated growth rate of Visa Class A share price	14.0%
					Estimated length of litigation resolution date	Q2 2019
Insignificant Level 3 assets, net of liabilities (c)	80
Total Level 3 assets, net of liabilities (d)	$	8,397

(a) The assumed yield spread over the benchmark curve for each instrument is generally intended to incorporate non-interest-rate risks, such as credit and liquidity risks.

(b) Consensus pricing refers to fair value estimates that are generally internally developed using information such as dealer quotes or other third-party provided valuations or comparable asset prices.

(c) Represents the aggregate amount of Level 3 assets and liabilities measured at fair value on a recurring basis that are individually and in the aggregate insignificant. The amount includes certain financial derivative assets and liabilities, trading securities, state and municipal and other debt securities, residential mortgage loans held for sale, other assets, other borrowed funds and other liabilities.

(d) Consisted of total Level 3 assets of $6.4 billion and total Level 3 liabilities of $.5 billion as of December 31, 2017 and $8.8 billion and $.4 billion as of December 31, 2016, respectively.

Fair Value Measurements - Nonrecurring

Table 55: Fair Value Measurements – Nonrecurring

	Fair Value
In millions	December 31 2017		December 31 2016
Assets (a)
Nonaccrual loans	$	100	$	187
OREO, foreclosed and other assets	70		107
Long-lived assets	80		18
Total assets	$	250	$	312

Year ended December 31 In millions	Gains (Losses)
	2017			2016			2015
Assets (a)
Nonaccrual loans	$	(8	)	$	(106	)	$	(44	)
OREO, foreclosed and other assets	(10		)	(16		)	(18		)
Long-lived assets	(168		)	(15		)	(20		)
Total assets	$	(186	)	$	(137	)	$	(82	)

(a) All Level 3 for the periods presented.

Fair Value Measurements - Nonrecurring Quantitative Information

Quantitative information about the significant unobservable inputs within Level 3 nonrecurring assets follows.

Table 56: Fair Value Measurements – Nonrecurring Quantitative Information

Level 3 Instruments Only Dollars in millions	Fair Value		Valuation Techniques	Unobservable Inputs (a)
December 31, 2017
Assets
Nonaccrual loans	$	100	Fair value of property or collateral	Appraised value/sales price
OREO, foreclosed and other assets	70		Fair value of property or collateral	Appraised value/sales price
Long-lived assets	47		Fair value of property or collateral	Appraised value/sales price
	20		Fair value of property or collateral	Broker opinion
	13		Fair value of property or collateral	Projected income/required improvement costs
Total assets	$	250
December 31, 2016
Assets
Nonaccrual loans	$	187	Fair value of property or collateral	Appraised value/sales price
OREO, foreclosed and other assets	107		Fair value of property or collateral	Appraised value/sales price
Long-lived assets	18		Fair value of property or collateral	Appraised value/sales price
Total assets	$	312

(a) Additional quantitative information for the unobservable inputs was not meaningful for the periods presented.

Fair Value Option - Fair Value and Principal Balances

Fair values and aggregate unpaid principal balances of items for which we elected the fair value option follow.

Table 57: Fair Value Option – Fair Value and Principal Balances

In millions	Fair Value		Aggregate Unpaid Principal Balance		Difference
December 31, 2017
Assets
Residential mortgage loans held for sale
Performing loans	$	822	$	796	$	26
Accruing loans 90 days or more past due	3		3
Nonaccrual loans	7		8		(1		)
Total	$	832	$	807	$	25
Commercial mortgage loans held for sale (a)
Performing loans	$	828	$	842	$	(14	)
Nonaccrual loans	2		3		(1		)
Total	$	830	$	845	$	(15	)
Residential mortgage loans
Performing loans	$	251	$	280	$	(29	)
Accruing loans 90 days or more past due	421		431		(10		)
Nonaccrual loans	197		317		(120		)
Total	$	869	$	1,028	$	(159	)
Other assets	$	216	$	212	$	4
Liabilities
Other borrowed funds	$	84	$	85	$	(1	)
December 31, 2016
Assets
Residential mortgage loans held for sale
Performing loans	$	1,000	$	988	$	12
Accruing loans 90 days or more past due	4		4
Nonaccrual loans	6		6
Total	$	1,010	$	998	$	12
Commercial mortgage loans held for sale (a)
Performing loans	$	1,395	$	1,412	$	(17	)
Nonaccrual loans	5		9		(4		)
Total	$	1,400	$	1,421	$	(21	)
Residential mortgage loans
Performing loans	$	247	$	289	$	(42	)
Accruing loans 90 days or more past due	427		428		(1		)
Nonaccrual loans	219		346		(127		)
Total	$	893	$	1,063	$	(170	)
Other assets	$	293	$	288	$	5
Liabilities
Other borrowed funds	$	81	$	82	$	(1	)

(a) There were no accruing loans 90 days or more past due within this category at December 31, 2017 or December 31, 2016.

Fair Value Option - Changes in Fair Value

Table 58: Fair Value Option – Changes in Fair Value (a)

Year ended December 31 In millions	Gains (Losses)
	2017			2016		2015
Assets
Residential mortgage loans held for sale	$	121		$	152	$	152
Commercial mortgage loans held for sale	$	87		$	76	$	96
Residential mortgage loans	$	27		$	30	$	43
Other assets	$	60		$	50	$	(8	)
Liabilities
Other liabilities	$	(26	)			$	4

(a) The impact on earnings of offsetting hedged items or hedging instruments is not reflected in these amounts.

Additional Fair Value Information Related to Other Financial Instruments

Table 59: Additional Fair Value Information Related to Other Financial Instruments

In millions	Carrying Amount		Fair Value
			Total		Level 1		Level 2		Level 3
December 31, 2017
Assets
Cash and due from banks	$	5,249	$	5,249	$	5,249
Interest-earning deposits with banks	28,595		28,595				$	28,595
Securities held to maturity	18,513		18,565		765		17,658		$	142
Net loans (excludes leases)	209,044		211,175						211,175
Other assets	6,078		6,736				5,949		787
Total assets	$	267,479	$	270,320	$	6,014	$	52,202	$	212,104
Liabilities
Deposits	$	265,053	$	264,854			$	264,854
Borrowed funds	57,744		58,503				56,853		$	1,650
Unfunded loan commitments and letters of credit	297		297						297
Other liabilities	399		399				399
Total liabilities	$	323,493	$	324,053			$	322,106	$	1,947
December 31, 2016
Assets
Cash and due from banks	$	4,879	$	4,879	$	4,879
Interest-earning deposits with banks	25,711		25,711				$	25,711
Securities held to maturity	15,843		15,866		540		15,208		$	118
Net loans (excludes leases)	199,766		201,863						201,863
Other assets	4,793		5,243				4,666		577
Total assets	$	250,992	$	253,562	$	5,419	$	45,585	$	202,558
Liabilities
Deposits	$	257,164	$	257,038			$	257,038
Borrowed funds	51,736		52,322				50,941		$	1,381
Unfunded loan commitments and letters of credit	301		301						301
Other liabilities	417		417				417
Total liabilities	$	309,618	$	310,078			$	308,396	$	1,682