Financing Activities - Interest Expense (Details) - Convertible Debt - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
Non-cash amortization of debt issuance costs	$ 3	$ 3	$ 8	$ 8
Contractual coupon interest	5	5	15	15
Total interest expense	$ 8	$ 8	$ 23	$ 23