Other Expense, Net - Summary (Details) $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 CAD ($)	Dec. 31, 2019 CAD ($)
Other Income and Expenses [Abstract]
Foreign exchange loss	$ (2)	$ (4)	$ (12)
Loss on commodity contracts	(85)	(22)	0
Income from equity method investments	19	8	10
Insurance recovery	0	15	0
Provision related to a litigation	(1)	0	(23)
Miscellaneous (expense) income	(1)	(1)	3
Other income (expense), net	(70)	$ (4)	$ (22)
Legal indemnity and interest costs	$ 24			$ 30	$ 30