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Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward] |  |
Balance, beginning of period | $ 1,854.5 | $ 1,573.2
Other comprehensive (loss) income before reclassifications | (30.9) |
Amounts reclassified out from accumulated other comprehensive (loss) income | 1.3 |
Other comprehensive loss, net of tax | (29.6) | (42.7)
Balance, end of period | 1,829.0 | 1,490.2
(Losses) gains on derivatives |  |
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward] |  |
Balance, beginning of period | (1.9) |
Other comprehensive (loss) income before reclassifications | (2.6) |
Amounts reclassified out from accumulated other comprehensive (loss) income | 0.8 |
Other comprehensive loss, net of tax | (1.8) |
Balance, end of period | (3.7) |
Change in equity affiliate investment AOCI |  |
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward] |  |
Balance, beginning of period | 0.6 |
Other comprehensive (loss) income before reclassifications | 0.0 |
Amounts reclassified out from accumulated other comprehensive (loss) income | 0.0 |
Other comprehensive loss, net of tax | 0.0 |
Balance, end of period | 0.6 |
Defined benefit pension and other postretirement plans |  |
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward] |  |
Balance, beginning of period | (40.5) |
Other comprehensive (loss) income before reclassifications | 0.1 |
Amounts reclassified out from accumulated other comprehensive (loss) income | 0.5 |
Other comprehensive loss, net of tax | 0.6 |
Balance, end of period | (39.9) |
Foreign currency translation |  |
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward] |  |
Balance, beginning of period | (68.8) |
Other comprehensive (loss) income before reclassifications | (28.4) |
Amounts reclassified out from accumulated other comprehensive (loss) income | 0.0 |
Other comprehensive loss, net of tax | (28.4) |
Balance, end of period | (97.2) |
Accumulated other comprehensive loss |  |
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward] |  |
Balance, beginning of period | (110.6) | (149.6)
Other comprehensive loss, net of tax | (29.6) | (42.7)
Balance, end of period | $ (140.2) | $ (192.3)

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- Definition Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121640130&loc=d3e1436-108581 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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