Debt and Letters of Credit - Schedule of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Current:
Short-term debt and current portion of long-term debt	$ 17	$ 152
Long-term:
Borrowings under credit facility	0	0
Long-term debt	979	978
Other long-term borrowings	2	2
Total long-term	979	978
2023 Notes
Current:
Short-term debt and current portion of long-term debt	0	138
Other borrowings
Current:
Short-term debt and current portion of long-term debt	17	14
2024 Notes
Long-term:
Long-term debt	381	381
Unamortized discount	(1)	(1)
Unamortized deferred financing costs	0	0
2028 Notes
Long-term:
Long-term debt	600	600
Unamortized discount	(1)	(1)
Unamortized deferred financing costs	$ (2)	$ (3)