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Commitments and Contingencies Commitments and Contingencies Additional Information (Details) | Dec. 31, 2020
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Commitments and Contingencies Disclosure [Abstract] |
Firm price contracts, percentage of expected average monthly natural gas and electricity needs covered | 17.00%

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- Definition Percentage Of Expected Natural Gas Requirement Covered Under Contract For Next Fiscal Year + References No definition available. + Details
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Balance Type: | na
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- References No definition available. + Details
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