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Derivative Instruments and Hedging Activities - Gains Losses on Freestanding Derivatives (Details) - Other non-interest income - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains (losses) on derivatives not designated as accounting hedges | $ 44 | $ 30
Interest rate contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains (losses) on derivatives not designated as accounting hedges | 16 | 19
Interest rate contracts | Customer accommodation |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains (losses) on derivatives not designated as accounting hedges | 9 | 10
Interest rate contracts | Other interest rate exposures |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains (losses) on derivatives not designated as accounting hedges | 26 | 11
Commodity contracts | Customer accommodation |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains (losses) on derivatives not designated as accounting hedges | 6 | 5
Foreign exchange contracts | Customer accommodation |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains (losses) on derivatives not designated as accounting hedges | 1 | 4
Other contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gains (losses) on derivatives not designated as accounting hedges | $ 2 | $ 0

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
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