Leases - Lease Term and Discount Rate (Details)	Dec. 31, 2020	Dec. 31, 2019
Weighted Average Remaining Lease Term
Operating Leases	4 years 6 months	4 years 3 months 18 days
Finance Leases	7 years 8 months 12 days	8 years 4 months 24 days
Weighted Average Discount Rate
Operating Leases	2.80%	3.30%
Finance Leases	1.40%	1.40%