Debt - Margin Loan Facility (Details) - SPV - USD ($) shares in Millions, $ in Millions		9 Months Ended
	Jun. 26, 2024	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Margin loan facility
Debt disclosures
Carrying value		$ 840	$ 790
Remaining borrowing capacity		$ 1,100
Number of business days prior to the maturity date		5 days
Basis spread on variable rate	1.875%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember
Commitment Fee Percentage	0.50%
Interest rate		5.90%		6.50%
Margin loan facility | Charter | Asset pledged as collateral
Debt disclosures
Shares owned		19.1
Value of pledged collateral		$ 5,200
Revolving credit facility
Debt disclosures
Maximum borrowing capacity	$ 1,150
Uncommitted incremental term loan facility
Debt disclosures
Maximum borrowing capacity	200
Term loan
Debt disclosures
Carrying value	$ 1,150