Debt - Summary of long-term debt (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2020	Dec. 31, 2018
Debt
Other long-term debt	$ 39	$ 38
Total debt at face value	717	710
Current maturities of long-term debt and unamortized discount	(9)	(8)
Long-term debt, less current maturities	708	702
Term loan due 2028
Debt
Debt at face value	$ 677	$ 670		$ 700
Effective interest rate (as a percent)	1.73%	6.01%
Foreign subsidiary obligations
Debt
Debt at face value	$ 1	$ 2
Equipment loan
Debt
Long-term debt assumed	$ 9
Interest rate (as a percent)	5.60%
Note due 2027
Debt
Debt at face value			$ 30
Interest rate (as a percent)			1.28%