Segment and Geographic Information - Information by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 3,932.2	$ 3,939.3
Income before income taxes	11.1	6.1
Interest expense, net	3.1	3.5
Depreciation and amortization	17.4	15.7
Capital expenditures:	4.9	5.0
Interest income		0.1
Cigarettes
Segment Reporting Information [Line Items]
Net sales	2,587.7	2,582.7
Cigarettes | United States
Segment Reporting Information [Line Items]
Inventory holding gains	8.3
Cigarettes | Canada
Segment Reporting Information [Line Items]
Inventory holding gains	3.8
Operating Segment | United States
Segment Reporting Information [Line Items]
Net sales	3,570.1	3,579.6
Income before income taxes	25.5	9.2
Interest expense, net	14.5	14.6
Depreciation and amortization	12.5	10.8
Capital expenditures:	4.1	4.4
Operating Segment | Canada
Segment Reporting Information [Line Items]
Net sales	354.4	348.4
Income before income taxes	0.6	2.4
Interest expense, net	0.7	0.5
Depreciation and amortization	1.1	0.8
Capital expenditures:	0.8	0.6
Corporate
Segment Reporting Information [Line Items]
Net sales	7.7	11.3
Income before income taxes	(15.0)	(5.5)
Interest expense, net	(12.1)	(11.6)
Depreciation and amortization	$ 3.8	$ 4.1