Financial Instruments and Risk Management - Summary of Assets By Fair Value Hierarchy (Details) $ in Millions |
Sep. 30, 2020
USD ($)
|
|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
| Tax Receivable Agreement | $ 147.1 |
| Quoted prices in active markets for identical assets (Level 1) | |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
| Tax Receivable Agreement | 0.0 |
| Interest rate swaps | 0.0 |
| Other observable inputs (Level 2) | |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
| Tax Receivable Agreement | 0.0 |
| Interest rate swaps | 37.8 |
| Unobservable inputs (Level 3) | |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |
| Tax Receivable Agreement | 147.1 |
| Interest rate swaps | $ 0.0 |