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v3.20.4

Non Operating Income and Expenses (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Other Income and Expenses [Abstract] |  |  |
Interest Expense | $ (44.4) | $ (49.8) | $ (39.5)
Interest Costs Capitalized | 0.0 | 5.9 | 9.0
Amortization of Debt Issuance Costs | (2.1) | (2.0) | (1.4)
Interest Income, Other | 0.0 | 1.1 | 1.2
Interest expense, net | (46.5) | (44.9) | (30.7)
Write off of Deferred Debt Issuance Cost | (5.9) | (2.7) | 0.0
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component | (7.6) | (5.7) | (4.9)
Nonoperating Income (Expense) | $ (59.9) | $ (53.3) | $ (35.6)

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