Acquisitions - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) store	Dec. 31, 2018 USD ($) store	Nov. 30, 2018 store	Feb. 28, 2018 store
Business Acquisition [Line Items]
Purchase price | $	$ 46.8	$ 125.4
Cash paid | $	44.9	113.7
Liabilities incurred | $	1.9	$ 11.7
Revenue since acquisition | $	31.0
Transaction and integration costs | $	1.3
Net earnings since acquisition | $	1.2
Payments for Previous Acquisition | $	$ 7.6
Mexico
Business Acquisition [Line Items]
Number of stores acquired	163
Number of acquisitions	13
United States
Business Acquisition [Line Items]
Number of stores acquired	27
Number of acquisitions	9
Latin America Operations
Business Acquisition [Line Items]
Number of stores acquired		366	403	126
Number of acquisitions	13	6	5
Latin America Operations | Mexico
Business Acquisition [Line Items]
Number of acquisitions	18
Latin America Operations | Franchise [Member]
Business Acquisition [Line Items]
Number of stores acquired	43
U.S. Acquisitions
Business Acquisition [Line Items]
Number of stores acquired		27
Number of acquisitions		9