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CONSOLIDATED STATEMENTS OF CASH FLOWS SUPPLEMENTAL DISCLOSURE OF NON-CASH ITEMS (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CONSOLIDATED STATEMENTS OF CASH FLOWS NON-CASH SUPPLEMENTAL DATA
Capital lease for acquisition of promotional vehicles	$ 1.5	$ 2.7	$ 2.6
Accounts payable for property and equipment	0.7	2.3	0.1
Accrued liabilities for property and equipment	0.0	3.8	4.6
Accrued liabilities for other intangible assets	$ 10.8	$ 3.7	$ 3.8