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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Estimated Useful Lives of Property, Plant and Equipment | Depreciation is computed using the straight-line method at rates based on the estimated useful lives of the various classes of assets. Finance lease assets and leasehold improvements are amortized on a straight-line basis over the shorter of the estimated useful lives of the assets or the lease term. The estimated useful lives are as follows:
|  | Range (in years)
Land improvements |  | 3-25
Buildings and leasehold improvements |  | 2-45
Machinery and equipment |  | 1-22
Finance lease assets |  | 1-10

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