Debt - Additional Information (Details) |
12 Months Ended | ||||||||
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Aug. 09, 2019
USD ($)
$ / shares
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Dec. 31, 2019
USD ($)
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Dec. 31, 2018
USD ($)
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Debt Instrument [Line Items] | |||||||||
Debt, par value, maturing in 2023 | $ 450,000,000.0 | ||||||||
Debt, par value, maturing in 2024 | 400,000,000.0 | ||||||||
Term loan outstanding | 1,793,800,000 | $ 1,829,600,000 | |||||||
Senior notes | |||||||||
Debt Instrument [Line Items] | |||||||||
Term loan outstanding | $ 743,800,000 | 742,500,000 | |||||||
Senior notes | 2024 Senior Notes | |||||||||
Debt Instrument [Line Items] | |||||||||
Effective interest rate | 4.42% | ||||||||
Stated interest rate | [1] | 4.25% | |||||||
Senior notes | 2025 Senior Notes | |||||||||
Debt Instrument [Line Items] | |||||||||
Effective interest rate | 3.66% | ||||||||
Stated interest rate | [1] | 3.50% | |||||||
Junior subordinated notes | |||||||||
Debt Instrument [Line Items] | |||||||||
Term loan outstanding | $ 289,700,000 | 0 | |||||||
Effective interest rate | 5.96% | ||||||||
Stated interest rate | [2],[3] | 5.875% | |||||||
Senior bank debt | |||||||||
Debt Instrument [Line Items] | |||||||||
Term loan outstanding | $ 449,700,000 | 779,700,000 | |||||||
Senior bank debt | LIBOR | |||||||||
Debt Instrument [Line Items] | |||||||||
Basis spread over variable debt rate | 0.875% | ||||||||
Senior bank debt | Revolver | |||||||||
Debt Instrument [Line Items] | |||||||||
Maximum borrowing capacity | $ 1,250,000,000 | ||||||||
Maximum borrowing capacity, additional amount | 500,000,000.0 | ||||||||
Outstanding borrowings | 0 | $ 330,000,000.0 | |||||||
Weighted average debt interest rate | 3.92% | ||||||||
Commitment fee amount | 1,500,000 | $ 1,600,000 | |||||||
Senior bank debt | Term Loan | |||||||||
Debt Instrument [Line Items] | |||||||||
Maximum borrowing capacity | 450,000,000.0 | ||||||||
Maximum borrowing capacity, additional amount | 75,000,000.0 | ||||||||
Term loan outstanding | $ 450,000,000.0 | $ 450,000,000 | |||||||
Weighted average interest rate on amount outstanding | 2.66% | 3.33% | |||||||
Junior convertible securities | |||||||||
Debt Instrument [Line Items] | |||||||||
Term loan outstanding | $ 310,600,000 | $ 307,400,000 | |||||||
Stated interest rate | 5.15% | ||||||||
Deferred tax liability | $ 8,400,000 | ||||||||
Conversion ratio (in shares) | 0.2558 | ||||||||
Principal amount at maturity | $ 50.00 | ||||||||
Conversion price (in usd per share) | $ / shares | $ 195.47 | ||||||||
Redemption closing price trigger (in usd per share) | $ / shares | $ 254.10 | ||||||||
Number of trading days closing price has exceeded threshold | 20 | ||||||||
Number of consecutive trading days | 30 | ||||||||
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