Derivative Financial Instruments and Hedging Activities - Schedule of Fair Value of Derivatives (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Non-Designated \| Foreign currency forward contracts
Derivative [Line Items]
Notional	$ 89.4	$ 277.5
Cash Flow Hedging \| Designated \| Cross-currency interest rate swaps
Derivative [Line Items]
Notional	0.0
Cash Flow Hedging \| Designated \| Interest rate swaps
Derivative [Line Items]
Notional	1,800.0
Cash Flow Hedging \| Designated \| Interest rate caps
Derivative [Line Items]
Notional	0.0
Net Investment Hedging \| Designated \| Foreign currency net investment hedges
Derivative [Line Items]
Notional	0.0
Other non-current assets \| Non-Designated \| Foreign currency forward contracts
Derivative [Line Items]
Assets fair value	0.8	0.8
Other non-current assets \| Cash Flow Hedging \| Designated \| Cross-currency interest rate swaps
Derivative [Line Items]
Assets fair value	0.0	7.1
Other non-current assets \| Cash Flow Hedging \| Designated \| Interest rate swaps
Derivative [Line Items]
Assets fair value	9.9	0.5
Other non-current assets \| Cash Flow Hedging \| Designated \| Interest rate caps
Derivative [Line Items]
Assets fair value	0.0	8.9
Other non-current assets \| Net Investment Hedging \| Designated \| Foreign currency net investment hedges
Derivative [Line Items]
Assets fair value	0.0	0.0
Other non-current liabilities \| Non-Designated \| Foreign currency forward contracts
Derivative [Line Items]
Liabilities fair value	0.9	2.2
Other non-current liabilities \| Cash Flow Hedging \| Designated \| Cross-currency interest rate swaps
Derivative [Line Items]
Liabilities fair value	0.0	0.4
Other non-current liabilities \| Cash Flow Hedging \| Designated \| Interest rate swaps
Derivative [Line Items]
Liabilities fair value	0.0	0.0
Other non-current liabilities \| Cash Flow Hedging \| Designated \| Interest rate caps
Derivative [Line Items]
Liabilities fair value	0.0	0.0
Other non-current liabilities \| Net Investment Hedging \| Designated \| Foreign currency net investment hedges
Derivative [Line Items]
Liabilities fair value	$ 0.0	$ 0.7

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
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