Variable Interest Entities - Classifications of Consolidated VIE Assets, Liabilities and Noncontrolling Interest Included in the Bancorp's Consolidated Balance Sheets (Details) - USD ($) $ in Millions		Mar. 31, 2024		Dec. 31, 2023		Mar. 31, 2023	Dec. 31, 2022
Assets
Other short-term investments	[1]	$ 22,840		$ 22,082
ALLL		(2,318)	[1]	(2,322)	[1]	$ (2,215)	$ (2,194)
Other assets	[1]	12,930		12,538
Total Assets		214,506		214,574
Liabilities
Other liabilities	[1]	5,379		4,861
Long-term debt	[1]	15,444		16,380
Total Liabilities		195,488		195,402
Variable Interest Entity, Primary Beneficiary | Automobile And Solar Loan
Assets
Other short-term investments		48		55
Indirect secured consumer loans		1,383		1,535
Solar energy installation loans		37		38
ALLL		(26)		(28)
Other assets		29		10
Total Assets		1,471		1,610
Liabilities
Other liabilities		25		14
Long-term debt		1,274		1,409
Total Liabilities		$ 1,299		$ 1,423

[1] Includes $48 and $55 of other short-term investments, $1,420 and $1,573 of portfolio loans and leases, $(26) and $(28) of ALLL, $29 and $10 of other assets, $25 and $14 of other liabilities and $1,274 and $1,409 of long-term debt from consolidated VIEs that are included in their respective captions above at March 31, 2024 and December 31, 2023, respectively. For further information, refer to Note 11.