Acquisitions and Dispositions of Businesses - Completed Dispositions (Details) - disposition	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Completed dispositions	4	5
Risk Capital
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Completed dispositions	1	3
Human Capital
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Completed dispositions	3	2