Supplemental Cash Flow Information - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Supplemental Cash Flow Information [Abstract]
Transfer from investments	$ 44	$ 70
Non-cash investing activities, right-of-use asset, property and equipment obtained	1	19
Noncash investing activities, right-of-use asset, real estate, obtained		1
Non-cash financing activities related to the issuance of shares for vested restricted stock units	26	28
Operating lease, payments	80	86
Right-of-use asset obtained in exchange for operating lease liability	$ 45	$ 50