Net (loss) income per common share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net (loss) income per common share
Net (loss) income	$ (4)	$ 14	$ (41)	$ (25)
Weighted average number of common shares outstanding - basic (in shares)	74.3	72.6	73.8	69.9
Weighted dilutive effect of equity awards (in shares)		2.1
Weighted average number of common shares outstanding - diluted (in shares)	74.3	74.7	73.8	69.9
Basic net (loss) income per common share
Basic net (loss) income per common share (in dollars per share)	$ (0.05)	$ 0.19	$ (0.56)	$ (0.36)
Diluted net (loss) income per common share
Diluted net (loss) income per common share (in dollars per share)	$ (0.05)	$ 0.19	$ (0.56)	$ (0.36)