Loans and Leases - Loans and Leases Classified by Primary Purpose (Details) - USD ($) $ in Millions		Jun. 30, 2023	Dec. 31, 2022
Loans and leases held for sale:
Loans and leases held for sale	[1]	$ 760	$ 1,007
Portfolio loans and leases:
Commercial and industrial loans		56,897	57,232
Commercial mortgage loans		11,310	11,020
Commercial construction loans		5,475	5,433
Commercial leases		2,670	2,704
Residential mortgage loans		17,503	17,628
Home equity		3,911	4,039
Indirect secured consumer loans		16,097	16,552
Credit card		1,818	1,874
Other consumer loans		6,210	4,998
Loans and leases		119,564	119,286
Total portfolio loans and leases	[2],[3]	121,891	121,480
Residential mortgage loans
Loans and leases held for sale:
Loans and leases held for sale		728	934
Commercial
Portfolio loans and leases:
Total portfolio loans and leases		76,352	76,389
Commercial | Commercial and industrial loans
Loans and leases held for sale:
Loans and leases held for sale		29	73
Portfolio loans and leases:
Total portfolio loans and leases		56,897	57,232
Commercial | Commercial leases
Loans and leases held for sale:
Loans and leases held for sale		3	0
Portfolio loans and leases:
Total portfolio loans and leases		2,670	2,704
Consumer
Portfolio loans and leases:
Loans and leases		$ 45,539	$ 45,091

[1] Includes $596 and $600 of residential mortgage loans held for sale measured at fair value at June 30, 2023 and December 31, 2022, respectively.

[2] Includes $1 and $17 of other short-term investments, $42 and $185 of portfolio loans and leases, $(1) and $(2) of ALLL, $0 and $2 of other assets, $9 and $9 of other liabilities, and $37 and $118 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2023 and December 31, 2022, respectively. For further information, refer to Note 11.

[3] Includes $124 and $123 of residential mortgage loans measured at fair value at June 30, 2023 and December 31, 2022, respectively.