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Investment Securities - Schedule of Unrealized Losses (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
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Investment securities available for sale: |  |
Investment securities available for sale, less than 12 months, fair value | $ 7,246 | $ 6,724
Investment securities available for sale, less than 12 months, unrealized losses | (550) | (54)
Investment securities available for sale, 12 months or more, fair value | 1,145 | 191
Investment securities available for sale, 12 months or more, unrealized losses | (103) | (3)
Investment securities available for sale, fair value | 8,391 | 6,915
Investment securities available for sale, unrealized losses | (653) | (57)
U.S. Treasury |  |
Investment securities available for sale: |  |
Investment securities available for sale, less than 12 months, fair value | 1,903 | 1,811
Investment securities available for sale, less than 12 months, unrealized losses | (102) | (2)
Investment securities available for sale, 12 months or more, fair value | 0 | 0
Investment securities available for sale, 12 months or more, unrealized losses | 0 | 0
Investment securities available for sale, fair value | 1,903 | 1,811
Investment securities available for sale, unrealized losses | (102) | (2)
Government agency |  |
Investment securities available for sale: |  |
Investment securities available for sale, less than 12 months, fair value | 47 | 17
Investment securities available for sale, less than 12 months, unrealized losses | (1) | 0
Investment securities available for sale, 12 months or more, fair value | 69 | 79
Investment securities available for sale, 12 months or more, unrealized losses | (1) | (1)
Investment securities available for sale, fair value | 116 | 96
Investment securities available for sale, unrealized losses | (2) | (1)
Residential mortgage-backed securities |  |
Investment securities available for sale: |  |
Investment securities available for sale, less than 12 months, fair value | 4,162 | 3,992
Investment securities available for sale, less than 12 months, unrealized losses | (362) | (36)
Investment securities available for sale, 12 months or more, fair value | 619 | 1
Investment securities available for sale, 12 months or more, unrealized losses | (67) | 0
Investment securities available for sale, fair value | 4,781 | 3,993
Investment securities available for sale, unrealized losses | (429) | (36)
Commercial mortgage-backed securities |  |
Investment securities available for sale: |  |
Investment securities available for sale, less than 12 months, fair value | 749 | 852
Investment securities available for sale, less than 12 months, unrealized losses | (72) | (15)
Investment securities available for sale, 12 months or more, fair value | 457 | 111
Investment securities available for sale, 12 months or more, unrealized losses | (35) | (2)
Investment securities available for sale, fair value | 1,206 | 963
Investment securities available for sale, unrealized losses | (107) | (17)
Corporate bonds |  |
Investment securities available for sale: |  |
Investment securities available for sale, less than 12 months, fair value | 385 | 52
Investment securities available for sale, less than 12 months, unrealized losses | (13) | (1)
Investment securities available for sale, 12 months or more, fair value | 0 | 0
Investment securities available for sale, 12 months or more, unrealized losses | 0 | 0
Investment securities available for sale, fair value | 385 | 52
Investment securities available for sale, unrealized losses | $ (13) | $ (1)

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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