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Accumulated Other Comprehensive Income (Loss) | 3 Months Ended
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Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Abstract] |
Comprehensive Income (Loss) Note [Text Block] | Accumulated Other Comprehensive Income (Loss) The following table sets forth the changes in AOCI, net of tax, by component during the three months ended March 31, 2021 and March 31, 2020:
| Foreign Currency Translation Gain (Loss) |  | Net Actuarial Gain and Prior Service Cost |  | Amortization of Gain on Interest Rate Swap |  | Net Gain (Loss) on Marketable Securities Held in Trust |  | Total
Three Months Ended March 31, 2021 |  |  |  |  |  |  |  |  |
Balance at December 31, 2020 | $ | (1,719.1) |  |  | $ | (109.7) |  |  | $ | 3.7 |  |  | $ | 18.9 |  |  | $ | (1,806.2) |
Other comprehensive income (loss) | (114.4) |  |  | 1.3 |  |  | 0.5 |  |  | (17.8) |  |  | (130.4) |
Tax (expense) benefit | 8.3 |  |  | 2.5 |  |  | — |  |  | — |  |  | 10.8 |
Other comprehensive income (loss), net of tax | (106.1) |  |  | 3.8 |  |  | 0.5 |  |  | (17.8) |  |  | (119.6) |
Other comprehensive income (loss) attributable to noncontrolling interest | 2.3 |  |  | — |  |  | — |  |  | — |  |  | 2.3 |
Balance as of March 31, 2021 | $ | (1,822.9) |  |  | $ | (105.9) |  |  | $ | 4.2 |  |  | $ | 1.1 |  |  | $ | (1,923.5) |
Three Months Ended March 31, 2020 |  |  |  |  |  |  |  |  |
Balance at December 31, 2019 | $ | (1,476.8) |  |  | $ | (129.6) |  |  | $ | 2.1 |  |  | $ | 6.1 |  |  | $ | (1,598.2) |
Other comprehensive income (loss) | (595.9) |  |  | 9.7 |  |  | 0.5 |  |  | 8.0 |  |  | (577.7) |
Tax (expense) benefit | (7.5) |  |  | (7.9) |  |  | — |  |  | — |  |  | (15.4) |
Other comprehensive income (loss), net of tax | (603.4) |  |  | 1.8 |  |  | 0.5 |  |  | 8.0 |  |  | (593.1) |
Other comprehensive income (loss) attributable to noncontrolling interest | 7.3 |  |  | — |  |  | — |  |  | — |  |  | 7.3 |
Balance as of March 31, 2020 | $ | (2,072.9) |  |  | $ | (127.8) |  |  | $ | 2.6 |  |  | $ | 14.1 |  |  | $ | (2,184.0) |

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- Definition Accumulated Other Comprehensive Income (Loss) [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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