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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Statement of Comprehensive Income [Abstract] |  |  |  |
Unrealized hedging gains (losses) and other, tax |  | $ (29.1) | $ (17.2) | $ 5.4
Reclassification of deferred hedging (gains) losses and other, included in net income, tax | [1] | 31.7 | 19.1 | 1.7
Total derivative instruments, tax |  | 2.6 | 1.9 | 7.1
Unrealized actuarial gains (losses) and prior service (costs) credits, tax |  | 2.9 | (4.3) | (4.5)
Reclassification of net actuarial and other (gain) loss, amortization of prior service costs and settlement charges, included in net income, tax | [1] | 2.9 | 2.4 | 2.5
Total pension and other postretirement benefits, tax |  | $ 5.8 | $ (1.9) | $ (2.0)
[1] | For more detail on the components of these reclassifications and the affected line item in the consolidated statements of income (loss), see Note 16 to the consolidated financial statements included within this Form 10-K for further details.

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- Definition Amount of tax expense (benefit) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 12 -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-12 + Details
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- Definition Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-12 + Details
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- Definition Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-12 + Details
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