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Fair Value Measurements - Additional Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Feb. 28, 2018 | Mar. 31, 2018 | Dec. 31, 2017
Derivative [Line Items] |  |  |
Amount expected to be reclassified during next 12 months |  | $ 0 |
Contingent consideration |  | 25,500,000 | $ 7,500,000
Earnings Based Metrics |  |  |
Derivative [Line Items] |  |  |
Maximum contingent consideration |  |  | $ 38,500,000.0
Level 3 | Earnings Based Metrics |  |  |
Derivative [Line Items] |  |  |
Increase in fair value of contingent consideration |  | $ 18,000,000 |
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swap |  |  |
Derivative [Line Items] |  |  |
Derivative average fixed interest rate |  | 2.4418% |
Total notional amount of swaps |  | $ 800,000,000 |
Senior Secured Notes, Maturing 2025 |  |  |
Derivative [Line Items] |  |  |
Debt interest rate | 2.946% |  |
Senior Secured Notes, Maturing 2025 | Senior Notes |  |  |
Derivative [Line Items] |  |  |
Debt interest rate | 2.946% | 5.00% |
Senior Secured Notes, Maturing 2025 | Senior Notes | Cross-currency interest rate swaps |  |  |
Derivative [Line Items] |  |  |
Long-term debt | $ 460,000,000 |  |
Senior Secured Euro Notes, Maturing 2026 | Net Investment Hedging | Designated as Hedging Instrument |  |  |
Derivative [Line Items] |  |  |
Designated as net investment non-derivative hedge | $ 125,000,000 |  |
Senior Secured Euro Notes, Maturing 2026 | Senior Notes |  |  |
Derivative [Line Items] |  |  |
Debt interest rate |  | 3.375% |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition This element represents the amount of any change recognized during the period in the high-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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