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, 2020		Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019		Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Assets
Other short-term Investments	[1]	$ 28,243				$ 1,950
ALLL		(2,696)	[1]	$ (2,348)	$ (33)	(1,202)	[1]	$ (1,115)	$ (1,115)	$ (1,103)
Other assets	[1]	10,789				9,190
Total Assets		202,906				169,369
Liabilities
Other liabilities	[1]	3,169				2,422
Long-term debt	[1]	16,327				14,970
Total Liabilities		180,571				148,166
Variable Interest Entity, Primary Beneficiary | Automobile loan
Assets
Other short-term Investments		66				74
Indirect secured consumer loans		1,032				1,354
ALLL		(14)				(7)
Other assets		7				8
Total Assets		1,091				1,429
Liabilities
Other liabilities		2				2
Long-term debt		933				1,253
Total Liabilities		$ 935				$ 1,255

[1] Includes $66 and $74 of other short-term investments, $1,032 and $1,354 of portfolio loans and leases, $(14) and $(7) of ALLL, $7 and $8 of other assets, $2 and $2 of other liabilities, and $933 and $1,253 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2020 and December 31, 2019, respectively. For further information refer to Note 13.