Severance (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Apr. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Severance [Roll Forward]
RestructuringIncurredCostStatementOfIncomeOrComprehensiveIncomeExtensibleEnumerationNotDisclosedFlag		true
Severance
Severance [Roll Forward]
Balance at beginning of period		$ 1	$ 3
Accrued to expense		32	17
Payments, net		(29)	(19)
Balance at end of period		$ 4	$ 1
Severance | Workforce Reduction
Restructuring Cost and Reserve [Line Items]
Percentage of workforce eliminated	3.00%
Restructuring costs	$ 25