MSR (Changes in the Servicing Assets) (Detail) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
		Jun. 30, 2016	Jun. 30, 2017		Jun. 30, 2016	Dec. 31, 2016	[1]
Servicing Assets at Fair Value
Carrying amount before valuation allowance as of the beginning of the period					$ 1,204
Servicing rights that result from the transfer of residential mortgage loans					28
Amortization		$ (35)			(61)
Carrying amount before valuation allowance		1,171			1,171
Valuation allowance for servicing rights:
Beginning balance					(419)
(Provision for) recovery of MSR impairment					(131)
Ending balance		(550)			(550)
Carrying amount as of the end of the period		$ 621	$ 849	[1]	$ 621	$ 744
Fair value at beginning of period			744
Servicing rights originated			66
Servicing rights acquired			109
Changes in fair value due to changes in inputs or assumptions	[2]		(13)
Changes in fair value due to other changes in fair value	[3]		(57)
Fair value at end of period			$ 849

[1] Effective January 1, 2017, the Bancorp has elected the fair value measurement method for all existing classes of its r esidential mortgage servicing rights. The servicing rights were measured at fair value at June 30, 2017 and were measured under the amortization method at December 31, 2016. For further information refer to Note 11 .

[2] Primarily reflects changes in prepayment speed and OAS spread assumptions which are updated based on market interest rates

[3] Pr imarily reflects changes due to collection of contractual cash flows and the passage of time