Variable Interest Entities - Classifications of Consolidated VIE Assets, Liabilities and Noncontrolling Interest Included in the Bancorp's Consolidated Balance Sheets (Details) - USD ($) $ in Millions		Jun. 30, 2021		Mar. 31, 2021	Dec. 31, 2020		Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Assets
Other short-term Investments	[1]	$ 32,409			$ 33,399
ALLL		(2,033)	[1]	$ (2,208)	(2,453)	[1]	$ (2,696)	$ (2,348)	$ (1,202)
Other assets	[1]	11,210			10,749
Total Assets		205,390			204,680
Liabilities
Other liabilities	[1]	4,304			3,409
Long-term debt	[1]	12,364			14,973
Total Liabilities		182,464			181,569
Variable Interest Entity, Primary Beneficiary | Automobile loan
Assets
Other short-term Investments		33			55
Indirect secured consumer loans		455			756
ALLL		(3)			(7)
Other assets		3			5
Total Assets		488			809
Liabilities
Other liabilities		1			2
Long-term debt		400			656
Total Liabilities		$ 401			$ 658

[1] Includes $33 and $55 of other short-term investments, $455 and $756 of portfolio loans and leases, $(3) and $(7) of ALLL, $3 and $5 of other assets, $1 and $2 of other liabilities, and $400 and $656 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2021 and December 31, 2020, respectively. For further information, refer to Note 11.