Supplemental Cash Flow Information - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Supplemental Cash Flow Information [Abstract]
Transfer from investments	$ 36	$ 21
Non-cash investing activities, right-of-use asset obtained	17
Non-cash investing activities, debt assumed	51
Non-cash financing activities related to the issuance of shares for vested restricted stock units	35	60
Operating lease, payments	33	43
Right-of-use asset obtained in exchange for operating lease liability	$ 4	$ 8