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Subsequent Event - Acquisition of Assets From 7-Eleven - Additional Information (Details) - US [Member] - Subsequent Event [Member] - 7 Eleven, Inc. [Member] - Asset Purchase Agreement [Member]
$ in Millions
Apr. 28, 2021
USD ($)
Segment
Subsequent Event [Line Items]  
Number of ownership and operations of operated sites 106
Aggregate purchase price | $ $ 263.0
Fee Site [Member]  
Subsequent Event [Line Items]  
Number of ownership and operations of operated sites 90
Leased Site [Member]  
Subsequent Event [Line Items]  
Number of ownership and operations of operated sites 16