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Leases (Weighted-Average Remaining Lease Term and Weighted-Average Discount Rate) (Details)
Dec. 31, 2021
Dec. 31, 2020
Weighted-average remaining lease term:    
Operating leases 7 years 7 years
Finance leases 12 years 15 years
Weighted-average discount rate:    
Operating leases 3.10% 3.50%
Finance leases 2.40% 2.70%