Loans and Leases - Loans and Leases Classified by Primary Purpose (Details) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021
Loans and leases held for sale:
Loans and leases held for sale	[1]	$ 2,542	$ 4,415
Portfolio loans and leases:
Commercial and industrial loans		56,095	51,659
Commercial mortgage loans		10,748	10,316
Commercial construction loans		5,357	5,241
Commercial leases		2,850	3,052
Residential mortgage loans		17,566	16,397
Home equity		3,906	4,084
Indirect secured consumer loans		17,017	16,783
Credit card		1,763	1,766
Other consumer loans		3,521	2,752
Loans and Leases		116,809	110,158
Total portfolio loans and leases	[2],[3]	118,823	112,050
Residential mortgage loans
Loans and leases held for sale:
Loans and leases held for sale		2,538	4,394
Commercial
Portfolio loans and leases:
Loans and Leases		75,050	70,268
Commercial | Commercial and industrial loans
Loans and leases held for sale:
Loans and leases held for sale		3	7
Portfolio loans and leases:
Loans and Leases		56,095	51,659
Loans and leases related to SBA Paycheck Protection Program of CARES Act		371	1,300
Commercial | Commercial mortgage loans
Loans and leases held for sale:
Loans and leases held for sale		0	13
Commercial | Commercial leases
Loans and leases held for sale:
Loans and leases held for sale		1	1
Portfolio loans and leases:
Loans and Leases		2,850	3,052
Consumer
Portfolio loans and leases:
Loans and Leases		$ 43,773	$ 41,782

[1] Includes $1,406 and $1,023 of residential mortgage loans held for sale measured at fair value at June 30, 2022 and December 31, 2021, respectively.

[2] Includes $133 and $154 of residential mortgage loans measured at fair value at June 30, 2022 and December 31, 2021, respectively.

[3] Includes $21 and $24 of other short-term investments, $267 and $322 of portfolio loans and leases, $(3) and $(2) of ALLL, $2 and $2 of other assets, $10 and $1 of other liabilities, and $200 and $263 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2022 and December 31, 2021, respectively. For further information, refer to Note 12.