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Commitments and Contingencies - Lifetime Lube, Oil and Filter Contracts Acquired (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Product Information [Line Items]
Total	$ 149.6	$ 126.1
Lifetime Oil Contracts
Product Information [Line Items]
2018	30.1
2019	23.9
2020	19.0
2021	15.8
2022	13.4
Thereafter	48.3
Total	$ 150.5

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