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Loans and Leases - Loans and Leases Classified by Primary Purpose (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Loans and leases held for sale:
Loans held for sale	$ 866	$ 733
Portfolio loans and leases:
Total portfolio loans and leases	178,528	122,651
Commercial
Portfolio loans and leases:
Total portfolio loans and leases	124,880	73,562
Commercial | Commercial and industrial loans
Loans and leases held for sale:
Loans held for sale	72	46
Portfolio loans and leases:
Total portfolio loans and leases	85,736	52,749
Commercial | Residential mortgage loans
Loans and leases held for sale:
Loans held for sale	695	658
Commercial | Commercial mortgage loans
Loans and leases held for sale:
Loans held for sale	32	29
Portfolio loans and leases:
Total portfolio loans and leases	27,196	12,228
Commercial | Commercial construction loans
Loans and leases held for sale:
Loans held for sale	66	0
Portfolio loans and leases:
Total portfolio loans and leases	8,459	5,316
Commercial | Commercial leases
Loans and leases held for sale:
Loans held for sale	1	0
Portfolio loans and leases:
Total portfolio loans and leases	3,489	3,269
Consumer
Portfolio loans and leases:
Total portfolio loans and leases	53,648	49,089
Consumer | Residential mortgage loans
Portfolio loans and leases:
Total portfolio loans and leases	19,713	17,652
Consumer | Home equity
Portfolio loans and leases:
Total portfolio loans and leases	6,929	4,846
Consumer | Indirect secured consumer loans
Portfolio loans and leases:
Total portfolio loans and leases	18,186	17,964
Consumer | Credit card
Portfolio loans and leases:
Total portfolio loans and leases	1,683	1,747
Consumer | Solar energy installation loans
Portfolio loans and leases:
Total portfolio loans and leases	4,314	4,560
Consumer | Other consumer loans
Portfolio loans and leases:
Total portfolio loans and leases	$ 2,823	$ 2,320

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+ References

No definition available.

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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477011/948-310-45-1

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