Segment and Geographic Area Information - Schedule of Capital Expenditure (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Capital expenditures	$ 453	$ 321	$ 219
Operating segments
Segment Reporting Information [Line Items]
Capital expenditures	440	310	205
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	$ 13	$ 11	$ 14

Amount of expenditure for addition to long-lived assets included in determination of segment assets by chief operating decision maker (CODM) or otherwise regularly provided to CODM. Excludes expenditure for addition to financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax assets.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
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