Income Taxes - Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Gross Deferred Tax Assets:
Bad debt reserve	$ 4.5	$ 5.0
Net operating loss	38.6	13.0
Accrued and other share-based compensation	26.2	20.6
Accrued expenses	5.0	0.0
U.S. foreign income tax credits	7.8	5.3
Other income tax credits	0.2	0.7
Customer deposits	6.3	5.7
Installment sale	0.0	6.7
Cash flow hedges	4.6	0.8
Unrealized foreign exchange	0.0	2.7
Total gross deferred tax assets	93.2	60.5
Less: Valuation allowance	7.1	2.9
Gross deferred tax assets, net of valuation allowance	86.1	57.6
Deferred Tax Liabilities:
Depreciation	(8.5)	(20.8)
Goodwill and intangible assets	(56.1)	(56.2)
Unrealized foreign exchange	(8.0)	0.0
Prepaid expenses, deductible for tax purposes	(5.8)	(4.4)
Accrued expenses	0.0	(2.5)
Unrealized derivatives	(2.4)	(5.1)
Other	(0.7)	0.0
Total gross deferred tax liabilities	(81.5)	(89.0)
Net deferred tax liability		(31.4)
Net deferred tax asset	4.6
Reported on the consolidated balance sheets as:
Identifiable intangible and other non-current assets for deferred tax assets, non-current	20.6	5.2
Non-current income tax liabilities, net for deferred tax liabilities, non-current	$ 16.0	$ 36.6