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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS SUPPLEMENTAL DISCLOSURE OF NON-CASH ITEMS (Parenthetical) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS NON-CASH SUPPLEMENTAL DATA
Capital lease for acquisition of promotional vehicles	$ 1.2	$ 2.0
Accrued liabilities for property and equipment		6.0
Accrued liabilities for other intangible assets	$ 10.9	4.6
Accounts payable on short-term investments		$ 4.2