Held-For-Sale Classification - Narrative (Details) - Assets held-for-sale - USD ($) shares in Millions, $ in Millions	May 22, 2023	May 02, 2023
Validus Re
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration for divestiture of business	$ 2,700
Share consideration received on transaction (in shares)	1.3
CRS
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration for divestiture of business		$ 240