Leases - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Option to extend lease period	30 years
Option to terminate lease period	1 year
Percentage of leased real estate of total lease obligation	75.00%
Additional leases that have not yet commenced	$ 218
Minimum
Lessee, Lease, Description [Line Items]
Term of leases that have not yet commenced	1 year
Maximum
Lessee, Lease, Description [Line Items]
Term of leases that have not yet commenced	20 years