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Leases - Additional Information (Details)
$ in Millions
Jun. 30, 2019
USD ($)
Operating Leases, Lease payments of leases not yet commenced $ 8
Minimum [Member]  
Operating Leases, Term of leases 1 year
Finance Lease, Term of lease 1 year
Maximum [Member]  
Operating Leases, Term of leases 11 years
Operating Leases, Options to extend the terms 7 years
Finance Lease, Term of lease 11 years
Finance Lease, Options to extend the terms 7 years