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Leases - Schedule of Weighted Average Remaining Lease Term and Discount Rate for Operating Leases (Details) | Dec. 31, 2020 | Dec. 31, 2019
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Weighted-average remaining lease term: |  |
Operating leases | 8 years | 9 years
Finance leases | 71 years | 3 years
Weighted-average discount rate: |  |
Operating leases | 3.10% | 3.40%
Finance leases | 5.00% | 2.30%
Leases excluding assets under construction |  |
Weighted-average remaining lease term: |  |
Finance leases | 3 years |
Weighted-average discount rate: |  |
Finance leases | 2.10% |
Real estate under development |  |
Weighted-average discount rate: |  |
Finance lease term | 99 years |

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