Variable Interest Entities - Classifications of Consolidated VIE Assets, Liabilities and Noncontrolling Interest Included in the Bancorp's Consolidated Balance Sheets (Details) - USD ($) $ in Millions		Sep. 30, 2024		Jun. 30, 2024	Dec. 31, 2023		Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Assets
Other short-term investments	[1]	$ 21,729			$ 22,082
ALLL		(2,305)	[1]	$ (2,288)	(2,322)	[1]	$ (2,340)	$ (2,327)	$ (2,194)
Other assets	[1]	11,587			12,538
Total Assets		214,318			214,574
Liabilities
Other liabilities	[1]	4,471			4,861
Long-term debt	[1]	17,096			16,380
Total Liabilities		193,534			195,402
Variable Interest Entity, Primary Beneficiary | Automobile And Solar Loan
Assets
Other short-term investments		50			55
Indirect secured consumer loans		1,097			1,535
Solar energy installation loans		34			38
ALLL		(21)			(28)
Other assets		8			10
Total Assets		1,168			1,610
Liabilities
Other liabilities		13			14
Long-term debt		1,008			1,409
Total Liabilities		$ 1,021			$ 1,423

[1] Includes $50 and $55 of other short-term investments, $1,131 and $1,573 of portfolio loans and leases, $(21) and $(28) of ALLL, $8 and $10 of other assets, $13 and $14 of other liabilities and $1,008 and $1,409 of long-term debt from consolidated VIEs that are included in their respective captions above at September 30, 2024 and December 31, 2023, respectively. For further information, refer to Note 12.