Operating Leases - Weighted Average Lease term and Discount Rates (Details)	Dec. 31, 2019
Leased Facilities and Equipment
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term (years)	3 years 3 months 3 days
Weighted average discount rate	3.18%
Leased Vehicles
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term (years)	2 years 10 months 20 days
Weighted average discount rate	2.70%