Fair Value of Assets and Liabilities - Summary of Liabilities Recorded at Carrying Value (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Document Period End Date	Jun. 30, 2017
Current notes payable - Fair value	$ 112.5	$ 106.9
Notes payable - Carrying value	112.5	106.9
Other Long-term Debt, Noncurrent	0.6	0.8
Other Long Term Debt Fair Value	0.6	0.8
Debt Issuance Costs, Noncurrent, Net	55.3	61.7
Debt Issuance Costs Noncurrent Net Fair Value	(55.3)	(61.7)
Long-term debt - Fair Value	1,833.5	1,717.4
Long-term debt	1,787.5	1,691.4
Total debt instruments - Fair value	1,946.0	1,824.3
Total debt instruments - Carrying value	1,900.0	1,798.3
December 2015 Term Loan [Member]
Debt Instrument [Line Items]
Term Loan Facility	189.8	201.3
Unsecured Long Term Debt Noncurrent Fair Value	189.8	201.3
Delayed Draw Term Loan A Facility [Member]
Debt Instrument [Line Items]
Term Loan Facility	235.9	0.0
Unsecured Long Term Debt Noncurrent Fair Value	235.9	0.0
Term Loan B USD [Member]
Debt Instrument [Line Items]
Term Loan Facility	469.1	787.5
Unsecured Long Term Debt Noncurrent Fair Value	469.1	787.5
Term Loan B EUR [Member]
Debt Instrument [Line Items]
Term Loan Facility	468.3	363.5
Unsecured Long Term Debt Noncurrent Fair Value	468.3	363.5
Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Senior Notes	400.0	400.0
Senior Notes Noncurrent Fair Value	$ 446.0	$ 426.0

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Other Long Term Debt Fair Value

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Senior Notes Noncurrent Fair Value

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Unsecured Long Term Debt Noncurrent Fair Value

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The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer.

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Fair value portion of notes payable.

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Amount of long-term debt classified as other, payable after one year or the operating cycle, if longer.

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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