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Goodwill and Other Intangible Assets - Summary Of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 449 | $ 449
Accumulated Amortization | (124) | (95)
Net Carrying Value | 325 | 354
Core deposit intangibles |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 371 | 371
Accumulated Amortization | (105) | (81)
Net Carrying Value | 266 | 290
Customer relationships |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 37 | 37
Accumulated Amortization | (10) | (8)
Net Carrying Value | 27 | 29
Other |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount | 41 | 41
Accumulated Amortization | (9) | (6)
Net Carrying Value | $ 32 | $ 35

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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