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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Accounting Policies [Abstract] |
Schedule of Total Government Assistance Recognized | The following table presents the total government assistance recognized during the year ended December 31, 2022 (in millions of dollars):
Grantor |  | Grant |  | Amount |  |  | Duration |  | Classification
Tennessee Department of Economic and Community Development |  | TN Fast Track |  | $ | 1.1 |  |  | 2021 - 2028 |  | Property, plant and equipment, net
Tennessee Department of Economic and Community Development |  | TN Fast Track |  |  | 0.2 |  |  | 2021 - 2028 |  | Selling, general, administrative, research and development
Tennessee Valley Authority |  | Performance |  |  | 0.3 |  |  | 2021 - 2026 |  | Property, plant and equipment, net
Indiana Economic Development Corporation |  | IN EDGE Tax Credit |  |  | 1.6 |  |  | 2021 - 2030 |  | Cost of products sold, excluding depreciation and amortization and other items
Indiana Department of Workforce Development |  | Employer Training Grant |  |  | 0.1 |  |  | 2022 |  | Cost of products sold, excluding depreciation and amortization and other items
Total |  |  |  | $ | 3.3 |  |  |  |  |
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. Depreciable 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 |  | 1-25
Buildings and leasehold improvements |  | 2-45
Machinery and equipment |  | 1-22
Depreciable finance lease assets |  | 2-120
Summarizes of Total Deferred Implementation Costs and Accumulated Amortization Related to Hosted Cloud Computing Software | The following table summarizes the total deferred implementation costs and accumulated amortization related to the hosted cloud computing software for our enterprise resource planning system refresh project (in millions of dollars):
|  | As of December 31, |  |  | Average
|  | 2022 |  |  | 2021 |  |  | Useful Life
Deferred implementation costs |  | $ | 10.4 |  |  | $ | 7.8 |  |  | 9 years
Accumulated amortization |  | $ | (1.1 | ) |  | $ | (0.1 | ) |  | n/a

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