Long-Term Debt - Summary of the Bancorp's Long-Term Borrowings (Details) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023	May 05, 2020	Jan. 31, 2020	Oct. 28, 2019	Jul. 26, 2018	Mar. 14, 2018	Mar. 15, 2016
Debt Instrument
Long-term debt	[1]	$ 14,337	$ 16,380
Amount Qualifying as Tier Two Capital for Regulatory Capital Purposes
Debt Instrument
Long-term debt		1,300	1,500
Parent Company
Debt Instrument
Long-term debt		$ 9,521	10,108
Parent Company | Senior Notes | Fixed Rate 3.65% Notes Due 2024
Debt Instrument
Interest rate (as a percent)		3.65%
Long-term debt		$ 0	1,500
Parent Company | Senior Notes | Fixed Rate 2.375% Notes Due 2025
Debt Instrument
Interest rate (as a percent)		2.375%				2.375%
Long-term debt		$ 750	749
Parent Company | Senior Notes | Fixed Rate 2.55% Notes Due 2027
Debt Instrument
Interest rate (as a percent)		2.55%		2.55%
Long-term debt		$ 748	748
Parent Company | Senior Notes | Fixed Rate/Floating Rate Notes Due 2027
Debt Instrument
Interest rate (as a percent)		1.707%
Long-term debt		$ 472	461
Parent Company | Senior Notes | Fixed Rate 3.95% Notes Due 2028
Debt Instrument
Interest rate (as a percent)		3.95%						3.95%
Long-term debt		$ 648	648
Parent Company | Senior Notes | Fixed Rate/Floating Rate 4.055 Percent Notes Due 2028
Debt Instrument
Interest rate (as a percent)		4.055%
Long-term debt		$ 387	386
Parent Company | Senior Notes | Fixed Rate/Floating Rate 6.361 Percent Notes Due 202
Debt Instrument
Interest rate (as a percent)		6.361%
Long-term debt		$ 999	1,013
Parent Company | Senior Notes | Fixed Rate/Floating-Rate 6.339% Notes Due 2029
Debt Instrument
Interest rate (as a percent)		6.339%
Long-term debt		$ 1,246	1,245
Parent Company | Senior Notes | Fixed Rate/Floating Rate 4.772 Percent Notes Due 2030
Debt Instrument
Interest rate (as a percent)		4.772%
Long-term debt		$ 933	944
Parent Company | Senior Notes | Fixed Rate/Floating Rate 4.895% Notes Due 2030
Debt Instrument
Interest rate (as a percent)		4.895%
Long-term debt		$ 747	0
Parent Company | Senior Notes | Fixed Rate/Floating Rate 5.631% Notes Due 2032
Debt Instrument
Interest rate (as a percent)		5.631%
Long-term debt		$ 996	0
Parent Company | Senior Notes | Fixed Rate/Floating Rate 4.337 Percent Notes Due 2033
Debt Instrument
Interest rate (as a percent)		4.337%
Long-term debt		$ 544	561
Parent Company | Subordinated Debt | Fixed Rate 4.30% Notes Due 2024
Debt Instrument
Interest rate (as a percent)		4.30%
Long-term debt		$ 0	750
Parent Company | Subordinated Debt | Fixed Rate 8.25% Notes Due 2038
Debt Instrument
Interest rate (as a percent)		8.25%
Long-term debt		$ 1,051	1,103
Subsidiaries
Debt Instrument
Long-term debt		4,816
Subsidiaries | FHLB Advances Due 2021 to 2047
Debt Instrument
Long-term debt		$ 1,508	1,510
Subsidiaries | FHLB Advances Due 2021 to 2047 | Weighted-Average
Debt Instrument
Interest rate (as a percent)		4.91%
Subsidiaries | Other Debt Due 2025 - 2052
Debt Instrument
Long-term debt		$ 312	297
Subsidiaries | Variable Interest Entity, Primary Beneficiary | Variable Rate | Automobile Loans
Debt Instrument
Long-term debt		$ 816	1,305
Subsidiaries | Variable Interest Entity, Primary Beneficiary | Variable Rate | Automobile Loans | Minimum
Debt Instrument
Interest rate (as a percent)		5.13%
Subsidiaries | Variable Interest Entity, Primary Beneficiary | Variable Rate | Automobile Loans | Maximum
Debt Instrument
Interest rate (as a percent)		5.80%
Subsidiaries | Variable Interest Entity, Primary Beneficiary | Fixed-Rate Notes Due 2026 - 2052 | Solar loan securitizations
Debt Instrument
Long-term debt		$ 30	35
Subsidiaries | Variable Interest Entity, Primary Beneficiary | Fixed-Rate Notes Due 2026 - 2052 | Solar loan securitizations | Minimum
Debt Instrument
Interest rate (as a percent)		4.05%
Subsidiaries | Variable Interest Entity, Primary Beneficiary | Fixed-Rate Notes Due 2026 - 2052 | Solar loan securitizations | Maximum
Debt Instrument
Interest rate (as a percent)		7.00%
Subsidiaries | Senior Notes | Fixed Rate 3.95% Notes Due 2025
Debt Instrument
Interest rate (as a percent)		3.95%					3.95%
Long-term debt		$ 747	727
Subsidiaries | Senior Notes | Fixed Rate/Floating Rate 5.852 Percent Notes Due 2025
Debt Instrument
Interest rate (as a percent)		5.852%
Long-term debt		$ 0	996
Subsidiaries | Senior Notes | Fixed Rate 2.25% Notes Due 2027
Debt Instrument
Interest rate (as a percent)		2.25%			2.25%
Long-term debt		$ 599	599
Subsidiaries | Subordinated Debt | Fixed Rate 3.85% Notes Due 2026
Debt Instrument
Interest rate (as a percent)		3.85%							3.85%
Long-term debt		$ 750	749
Subsidiaries | Junior Subordinated Debt | Floating-Rate Debentures Due 2035
Debt Instrument
Long-term debt		$ 54	$ 54
Subsidiaries | Junior Subordinated Debt | Floating-Rate Debentures Due 2035 | Minimum
Debt Instrument
Interest rate (as a percent)		6.04%
Subsidiaries | Junior Subordinated Debt | Floating-Rate Debentures Due 2035 | Maximum
Debt Instrument
Interest rate (as a percent)		6.31%

[1] Includes $51 and $55 of other short-term investments, $1,000 and $1,573 of portfolio loans and leases, $(19) and $(28) of ALLL, $5 and $10 of other assets, $12 and $14 of other liabilities and $889 and $1,409 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2024 and 2023, respectively. For further information, refer to Note 12.