Leases - Additional Information (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2019 |
Dec. 31, 2018 |
|
| Lessee Lease Description [Line Items] | |||
| Lease obligations for additional leases not yet commenced | $ 14.2 | $ 14.2 | |
| Operating leases not yet commenced, start year | 2019 | ||
| Operating leases not yet commenced, end year | 2021 | ||
| Lease exit liability | $ 32.1 | ||
| Net assets capitalized under leases | $ 48.4 | ||
| Operating lease liabilities | $ 16.2 | $ 49.4 | |
| Lease liabilities arising from obtaining operating lease right-of-use assets | $ 13.3 | ||
| Minimum | |||
| Lessee Lease Description [Line Items] | |||
| Operating leases, terms | 1 year | 1 year | |
| Maximum | |||
| Lessee Lease Description [Line Items] | |||
| Operating leases, terms | 5 years | 5 years |