Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Loss Contingencies [Line Items] | |||
Gross rent expense | $ 85.9 | $ 71.0 | $ 67.9 |
Sublease income | 11.8 | 10.6 | $ 4.5 |
Operating leases, future minimum payments no longer obligated to pay | 192.4 | ||
Property and equipment, gross | 874.5 | 846.7 | |
Imputed financing obligation | 27.4 | ||
Operating lease, minimum obligation | 831.6 | ||
Tenant improvement reimbursements | 75.0 | ||
Letter of credit | |||
Loss Contingencies [Line Items] | |||
Letter of credit supporting obligations | 34.2 | ||
Accrued and other current liabilities | |||
Loss Contingencies [Line Items] | |||
Imputed financing obligation | 2.6 | ||
Other Noncurrent Liabilities | |||
Loss Contingencies [Line Items] | |||
Imputed financing obligation | 24.8 | ||
Building | |||
Loss Contingencies [Line Items] | |||
Property and equipment, gross | $ 0.0 | $ 36.6 |