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Leases (Lease Terms and Discount Rates) (Details)
Dec. 31, 2021
Dec. 31, 2020
Weighted-average remaining lease term (years)    
Finance leases 1 year 10 months 24 days 9 months 18 days
Operating leases 6 years 2 months 12 days 6 years 9 months 18 days
Weighted-average discount rate (%)    
Finance leases 1.29% 3.10%
Operating leases 2.43% 2.79%