Acquisitions and Divestitures - 2015 Purchase Price Allocation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2014
Assets acquired:
Goodwill	$ 675.8	$ 835.8	$ 653.3
2015 Acquisitions
Business Acquisition [Line Items]
Purchase price	102.3
Less: Cash acquired	8.7
Estimated purchase price, net of cash acquired	93.6
Less: Amounts due to sellers and promissory notes issued	0.5
Cash paid for acquisition of businesses	93.1
Assets acquired:
Cash and cash equivalents	8.7
Accounts receivable	8.9
Inventories	7.4
Property and equipment	40.7
Identifiable intangible assets	25.9
Goodwill	39.4
Other current and long-term assets	31.1
Liabilities assumed:
Short-term debt	(0.5)
Accounts payable	(10.7)
Customer Deposits	(1.5)
Accrued expenses and other current liabilities	(38.6)
Non-current income tax liabilities and other long term liabilities	(8.5)
Estimated purchase price	$ 102.3