Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Mar. 15, 2023	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Effect of foreign exchange rate changes on cash and cash equivalents inclusive of fiduciary cash			$ 13	$ (34)	$ 131
Cash received from settlement of contingent payments		$ 57
Deferred federal income tax payments amounts due to Hurricane Debby and Milton tax relief			$ 90
Deferred federal income tax payments amounts due to Hurricane Idalia Tax Relief				121
Payments of accrued federal income tax payments due	$ 31
Tax payments associated with gain on disposal of businesses sold				$ 30