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Capital Stock - Schedule of Common Shares Issued (Details) - shares			12 Months Ended
	Dec. 23, 2019	Mar. 08, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Altria Investment
Class of Stock [Line Items]
Shares issued (in shares)		149,831,154
Common Shares
Class of Stock [Line Items]
Shares issued (in shares)			0	155,773,757	15,677,143
Common Shares | Altria Investment
Class of Stock [Line Items]
Shares issued (in shares)			0	149,831,154	0
Common Shares | Redwood Acquisition
Class of Stock [Line Items]
Shares issued (in shares)			0	5,086,586	0
Common Shares | Private Placements
Class of Stock [Line Items]
Shares issued (in shares)	856,017		0	856,017	0
Common Shares | Bought Deal Offerings
Class of Stock [Line Items]
Shares issued (in shares)			0	0	15,677,143

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