Debt - Summary of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Jul. 02, 2024	Feb. 28, 2023
Debt Instrument [Line Items]
Outstanding principal	$ 1,805
Total debt	1,792	$ 2,687
Debt classified as current	(102)
Total long-term debt	1,690	2,687
3.125% Exchangeable senior debentures due 2053
Debt Instrument [Line Items]
Outstanding principal	965
Carrying value	$ 952	$ 951
Interest rate (as a percent)	3.125%	3.125%	3.125%	3.125%
3.125% Exchangeable senior debentures due 2054
Debt Instrument [Line Items]
Carrying value		$ 946
Interest rate (as a percent)	3.125%	3.125%	3.125%
SPV | Margin loan facility
Debt Instrument [Line Items]
Outstanding principal	$ 840
Carrying value	$ 840	$ 790