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Acquisitions - Narrative (Details) - Mexico
$ in Millions
9 Months Ended
Sep. 30, 2020
USD ($)
acquisition
store
Entity Location [Line Items]  
Number of stores acquired | store 40
Number of acquisitions | acquisition 2
Aggregate purchase price $ 7.2
Cash paid in aggregate purchase price 6.4
Liabilities incurred in aggregate purchase price $ 0.8