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Debt - Additional Information (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 31, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2017 | Dec. 31, 2015 | Dec. 31, 2019 | May 31, 2019
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Borrowings |  |  | $ 1,264.7 | $ 1,264.7 |  |  |  | $ 1,050.6 |
Repayment and termination of Euro term loan |  |  |  | $ 49.9 | $ 9.0 |  |  |  |
Term Loan |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Repayment and termination of Euro term loan | $ 49.9 |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest coverage ratio required to be maintained |  |  |  | 375.00% |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest coverage ratio required to be maintained |  |  |  | 350.00% |  |  |  |  |
Senior unsecured credit facility- revolving loan due 2021 | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  | $ 700.0
Senior unsecured credit facility- revolving loan due 2024 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument expiration period |  | 2024-06 |  |  |  |  |  |  |
Debt instrument, interest rate terms |  |  |  | The interest rate ranges from LIBOR + 0.875% to a maximum of LIBOR + 1.50%, depending upon the better of the Company’s leverage ratio or the credit rating. During the second quarter of 2020 the interest rate for the Facility increased to LIBOR + 1.125%, reflecting a change in the leverage ratio. |  |  |  |  |
Credit facility interest rate basis |  |  | LIBOR + 1.125% |  |  |  |  |  |
Spread on variable interest rate basis |  |  | 1.125% |  |  |  |  |  |
Maximum amount available under credit facility agreement to issue letters of credit |  |  | $ 50.0 | $ 50.0 |  |  |  |  |
Letters of credit issued under credit facility |  |  |  | 0.0 |  |  |  |  |
Undrawn availability under credit facility |  |  | 432.0 | $ 432.0 |  |  |  |  |
Weighted average interest rate |  |  |  | 1.98% |  |  |  |  |
Debt instrument, covenant terms |  |  |  | As defined in the Facility agreement, we are required to maintain a minimum interest coverage ratio of 3.50 (based on the ratio of EBITDA to interest expense) and may not exceed a maximum leverage ratio of 3.75 (based on the ratio of total debt to EBITDA) with a step up to 4.25 allowed following certain acquisitions. |  |  |  |  |
Senior unsecured credit facility- revolving loan due 2024 | Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Borrowings |  |  | $ 568.0 | $ 568.0 |  |  |  |  |
Senior unsecured credit facility- revolving loan due 2024 | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 1,000.0 |  |  | $ 1,000.0 |  |  |  |
Credit facility interest rate basis |  | LIBOR + 1.50% |  |  |  |  |  |  |
Spread on variable interest rate basis |  | 1.50% |  |  |  |  |  |  |
Debt instrument covenant increase in interest coverage ratio |  |  |  | 425.00% |  |  |  |  |
Senior unsecured credit facility- revolving loan due 2024 | Minimum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Credit facility interest rate basis |  | LIBOR + 0.875% |  |  |  |  |  |  |
Spread on variable interest rate basis |  | 0.875% |  |  |  |  |  |  |
3.95% senior unsecured notes due 2027 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face value |  |  |  |  |  | $ 400.0 |  |  |
Debt instrument, interest rate |  |  | 3.95% | 3.95% |  | 3.95% |  |  |
Debt instrument, maturity year |  |  |  |  |  | 2027 |  |  |
Increase in senior notes interest rate |  |  |  |  |  | 0.25% |  |  |
Effective interest rate |  |  | 3.87% | 3.87% |  |  |  |  |
3.95% senior unsecured notes due 2027 | Treasury Lock | Interest Lock Agreement |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Percentage of effective interest rate benefit |  |  |  | 0.25% |  |  |  |  |
3.95% senior unsecured notes due 2027 | Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Fair value of senior unsecured notes |  |  | $ 427.7 | $ 427.7 |  |  |  |  |
3.95% senior unsecured notes due 2027 | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  | 5.95% |  |  |
4.7% senior unsecured notes due 2025 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Face value |  |  |  |  |  |  | $ 300.0 |  |
Debt instrument, interest rate |  |  |  |  |  |  | 4.70% |  |
Debt instrument, maturity year |  |  |  |  |  |  | 2025 |  |
Increase in senior notes interest rate |  |  |  |  |  |  | 0.25% |  |
Effective interest rate |  |  | 4.83% | 4.83% |  |  |  |  |
4.7% senior unsecured notes due 2025 | Level 2 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Fair value of senior unsecured notes |  |  | $ 326.7 | $ 326.7 |  |  |  |  |
4.7% senior unsecured notes due 2025 | Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  | 6.70% |  |

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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