Debt - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Outstanding debt	$ 4,367	$ 4,349
Debt issuance costs	57	60
Unamortized discount	$ 190	123
Term Loan
Debt Instrument [Line Items]
Weighted average interest rate	11.06%
Letter of Credit
Debt Instrument [Line Items]
Cash collateral for borrowed securities	$ 21	21
Letter of Credit \| Line of Credit
Debt Instrument [Line Items]
Outstanding letters of credit	$ 11	$ 11

Carrying amount as of the balance sheet date of cash collateral held for borrowed securities, for which the cash is restricted as to withdrawal or usage.

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