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Stockholders' Equity - Changes in Accumulated Other Comprehensive Income by Component (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2019 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |
Balance at January 1, 2019 | $ 2,672.4
Amounts reclassified from AOCI, net of tax | 3.3
Balance at March 31, 2019 | 2,794.6
Foreign Currency Translation Adjustments |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |
Balance at January 1, 2019 | (0.4)
Balance at March 31, 2019 | (0.4)
Unfunded Employee Benefit Obligations |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |
Balance at January 1, 2019 | (127.9)
Amounts reclassified from AOCI, net of tax | 2.3
Balance at March 31, 2019 | (125.6)
Accumulated Other Comprehensive Loss |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |
Balance at January 1, 2019 | (138.8)
Amounts reclassified from AOCI, net of tax | 3.3
Balance at March 31, 2019 | (135.5)
Treasury Lock | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |
Balance at January 1, 2019 | (10.2)
Amounts reclassified from AOCI, net of tax | 1.0
Balance at March 31, 2019 | (9.2)
Foreign Exchange Contract | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |
Balance at January 1, 2019 | (0.3)
Balance at March 31, 2019 | $ (0.3)

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- Definition Amount after tax of 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 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 2: 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=109228884&loc=d3e1436-108581 + 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://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 2: 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=6877327&loc=d3e13212-122682 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(29)) -URI http://asc.fasb.org/extlink&oid=6877327&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(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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