Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Supplemental Cash Flow Elements [Abstract]
Effect of foreign exchange rate changes on cash and cash equivalents inclusive of fiduciary cash	$ 22	$ (11)
Deferred federal income tax payments amounts due to Hurricane Debby and Milton tax relief			$ 90
Payments of accrued federal income tax payments due		91
Tax payments associated with gain on disposal of businesses sold		$ 30