Credit Quality (Summary of Transactions in the ALLL by Portfolio Segment) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses
Balance, Beginning of period		$ 1,196	[1]	$ 1,253		$ 1,272
Losses charged-off		(450)	[2]	(381)		(456)
Recoveries of losses previously charged-off		120	[2]	83		94
Provision for (benefit from) loan and lease losses		237		261		343
Deconsolidation of a VIE	[3]			(20)
Balance, end of period		1,103	[1]	1,196	[1]	1,253
Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Balance, Beginning of period		753		831		840
Losses charged-off		(157)	[2]	(154)		(232)
Recoveries of losses previously charged-off		25	[2]	29		42
Provision for (benefit from) loan and lease losses		24		66		181
Deconsolidation of a VIE	[3]			(19)
Balance, end of period		645		753		831
Residential Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Balance, Beginning of period		89	[4]	96	[4]	100
Losses charged-off		(13)	[2]	(15)		(19)
Recoveries of losses previously charged-off		6	[2]	8		9
Provision for (benefit from) loan and lease losses		(1)		0		6
Deconsolidation of a VIE	[3]			0
Balance, end of period		81	[5]	89	[4]	96	[4]
Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses
Balance, Beginning of period		234	[4]	214	[4]	217
Losses charged-off		(280)	[2]	(212)		(205)
Recoveries of losses previously charged-off		89	[2]	46		43
Provision for (benefit from) loan and lease losses		224		186		159
Deconsolidation of a VIE	[3]			0
Balance, end of period		267	[5]	234	[4]	214	[4]
Unallocated
Financing Receivable, Allowance for Credit Losses
Balance, Beginning of period		120	[4]	112	[4]	115
Losses charged-off		0	[2]	0		0
Recoveries of losses previously charged-off		0	[2]	0		0
Provision for (benefit from) loan and lease losses		(10)		9		(3)
Deconsolidation of a VIE	[3]			(1)
Balance, end of period		$ 110	[5]	$ 120	[4]	$ 112	[4]

[1] Includes $ 40 and $ 62 of other short-term investments, $ 668 and $ 1,297 of portfolio loans and leases, $ (4) and $ (6) of ALLL, $ 5 and $ 7 of other assets, $ 1 and $ 2 of other liabilities and $ 606 and $ 1,190 of long-term debt from consolidated VIEs that are included in their respec tive captions above at December 31, 2018 and 2017 , respectively. For further information, refer to Note 10 .

[2] (a) For the year ended December 31, 2018, the Bancorp recorded $29 in both losses charged-off and recoveries of losses charged-off related to customer defaults on point-of-sale consumer loans for which the Bancorp obtained recoveries under third-party credit enhancements.

[3] (a) Refer to Note 10 for further discussion on the deconsolidation of a VIE.

[4] Includes $ 1 related to leveraged leases at December 31, 2017 .

[5] Includes $ 1 related to leveraged leases at December 31, 2018 .