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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
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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Weighted-average discount rate.

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Weighted-average remaining lease term.

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Weighted average discount rate for finance lease calculated at point in time.

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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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