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v3.22.0.1

Other Operating Credits and Charges, Net Non-Operating Income and Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Interest Expense |  | $ 15.0 | $ 17.0 | $ 18.0
Amortization of financing costs and discounts |  | 2.0 | 2.0 | 2.0
Interest Costs Capitalized Adjustment |  | 3.0 | 0.0 | 1.0
Interest expense, net of capitalized interest |  | (14.0) | (19.0) | (19.0)
Investment Income, Interest and Dividend |  | 1.0 | 2.0 | 9.0
Realized Investment Gains (Losses) |  | 0.0 | 3.0 | 0.0
Interest Income, Other |  | 0.0 | (1.0) | 1.0
Investment income |  | 1.0 | 4.0 | 10.0
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component |  | 1.0 | 1.0 | 3.0
Foreign Currency Transaction Gain (Loss), Realized |  | (3.0) | 1.0 | (5.0)
Loss on early debt extinguishment |  | (11.0) | 0.0 | 0.0
Loss due to settlement |  | (2.0) | 0.0 | 0.0
Gain on Acquisition |  | 0.0 | 0.0 | 14.0
Other nonoperating items |  | (16.0) | $ 0.0 | $ 6.0
Redemption Premium |  | 9.0 |  |
Write off of deferred debt issuance cost |  | $ 2.0 |  |
Entekra [Member] |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Gain on Acquisition | $ 0.0 |  |  |

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