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v3.23.3

Changes in Accumulated Other Comprehensive Loss (Details of Accumulated Other Comprehensive Income Components) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Tax impact | $ 19.1 | $ 10.4 | $ 48.5 | $ 108.5
Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Total before tax | 4.8 | 3.0 | 11.5 | 12.0
Tax impact | 1.2 | 0.8 | 2.6 | 2.9
Total reclassifications for the period | 3.6 | 2.2 | 8.9 | 9.1
Pension |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Prior service costs (benefit) | (0.5) | 0.0 | (0.5) | 0.1
Net gain (loss) | 3.9 | 3.3 | 11.5 | 12.9
Postretirement |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] |  |  |  |
Prior service costs (benefit) | (0.2) | 0.3 | 0.3 | 0.8
Net gain (loss) | $ 0.2 | $ 0.0 | $ (0.2) | $ 0.0

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