Loans and Leases - Total Loans and Leases Managed by the Bancorp and Net Charge-Offs (Recoveries) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Carrying Value		$ 113,523	$ 110,958
90 Days Past Due and Still Accruing		163	130
Net Charge-Offs (Recoveries)		471	369
Loans and leases held for sale	[1]	4,741	1,400
Total portfolio loans and leases	[2],[3]	108,782	109,558
Residential mortgage loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Carrying Value		20,393	17,988
90 Days Past Due and Still Accruing		70	50
Net Charge-Offs (Recoveries)		2	4
Commercial
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Total portfolio loans and leases		68,997	69,958
Commercial | Commercial and industrial loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Carrying Value		49,895	50,677
90 Days Past Due and Still Accruing		39	11
Net Charge-Offs (Recoveries)		198	103
Commercial | Commercial mortgage loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Carrying Value		10,609	10,964
90 Days Past Due and Still Accruing		8	15
Net Charge-Offs (Recoveries)		45	(2)
Commercial | Commercial construction loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Carrying Value		5,815	5,090
90 Days Past Due and Still Accruing		0	0
Net Charge-Offs (Recoveries)		0	0
Commercial | Commercial leases
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Carrying Value		2,954	3,363
90 Days Past Due and Still Accruing		1	0
Net Charge-Offs (Recoveries)		23	7
Consumer
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Total portfolio loans and leases		39,785	39,600
Consumer | Home equity
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Carrying Value		5,183	6,083
90 Days Past Due and Still Accruing		2	1
Net Charge-Offs (Recoveries)		5	18
Consumer | Indirect secured consumer loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Carrying Value		13,653	11,538
90 Days Past Due and Still Accruing		10	10
Net Charge-Offs (Recoveries)		32	50
Consumer | Credit card
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Carrying Value		2,007	2,532
90 Days Past Due and Still Accruing		31	42
Net Charge-Offs (Recoveries)		126	134
Consumer | Other consumer loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together
Carrying Value		3,014	2,723
90 Days Past Due and Still Accruing		2	1
Net Charge-Offs (Recoveries)		$ 40	$ 55

[1] Includes $1,481 and $1,264 of residential mortgage loans held for sale measured at fair value at December 31, 2020 and 2019, respectively.

[2] Includes $161 and $183 of residential mortgage loans measured at fair value at December 31, 2020 and 2019, respectively.

[3] Includes $55 and $74 of other short-term investments, $756 and $1,354 of portfolio loans and leases, $(7) and $(7) of ALLL, $5 and $8 of other assets, $2 and $2 of other liabilities and $656 and $1,253 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2020 and 2019, respectively. For further information, refer to Note 13.