Financing Activities - Interest Expense (Details) - Convertible Debt - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Debt Instrument [Line Items]
Non-cash amortization of debt issuance costs	$ 3	$ 3	$ 5	$ 5
Contractual coupon interest	5	5	10	10
Total interest expense	$ 8	$ 8	$ 15	$ 15