Segment and Geographic Information - Net Sales By Product Categories (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 4,252.1	$ 4,502.6	$ 4,263.9	$ 3,939.3	$ 4,154.8	$ 4,422.6	$ 4,339.0	$ 3,754.1	$ 16,957.9	$ 16,670.5	$ 16,395.3
Total food/non-food products
Segment Reporting Information [Line Items]
Net sales	1,417.1	1,502.4	1,371.3	1,356.6	1,443.6	1,542.6	1,505.0	1,286.6	5,647.4	5,777.8	5,420.8
Cigarettes
Segment Reporting Information [Line Items]
Net sales	$ 2,835.0	$ 3,000.2	$ 2,892.6	$ 2,582.7	$ 2,711.2	$ 2,880.0	$ 2,834.0	$ 2,467.5	11,310.5	10,892.7	10,974.5
Food
Segment Reporting Information [Line Items]
Net sales									1,575.8	1,746.4	1,659.0
Fresh
Segment Reporting Information [Line Items]
Net sales									509.3	502.8	474.2
Candy
Segment Reporting Information [Line Items]
Net sales									1,004.0	1,039.0	992.0
Other tobacco products
Segment Reporting Information [Line Items]
Net sales									1,558.6	1,438.9	1,387.2
Health, beauty & general
Segment Reporting Information [Line Items]
Net sales									801.3	847.2	711.5
Beverages
Segment Reporting Information [Line Items]
Net sales									197.2	202.1	191.0
Equipment/other
Segment Reporting Information [Line Items]
Net sales									$ 1.2	$ 1.4	$ 5.9