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Financing Activities - Interest Expense (Details) - Convertible Debt - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Debt Instrument [Line Items]    
Non-cash amortization of debt issuance costs $ 3 $ 3
Contractual coupon interest 5 5
Total interest expense $ 8 $ 8