Supplemental Cash Flow Information - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Supplemental Cash Flow Information [Abstract]
Transfer from investments	$ 70	$ 54
Non-cash investing activities, right-of-use asset, property and equipment obtained	19
Noncash investing activities, right-of-use asset obtained in exchange for operating lease liability	1	15
Non-cash investing activities, debt assumed		123
Non-cash financing activities related to the issuance of shares for vested restricted stock units	28	38
Operating lease, payments	86	101
Right-of-use asset obtained in exchange for operating lease liability	$ 50	$ 26