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Accumulated Other Comprehenive Income (Loss) | 3 Months Ended
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Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | 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 Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 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=124509347&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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