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Accumulated Other Comprehenive Income (Loss) | 9 Months Ended
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Sep. 30, 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 and nine months ended September 30, 2021 and September 30, 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 September 30, 2021 |  |  |  |  |  |  |  |  |
Balance at June 30, 2021 | $ | (1,529.0) |  |  | $ | (104.7) |  |  | $ | 4.7 |  |  | $ | 4.7 |  |  | $ | (1,624.3) |
Other comprehensive income (loss) | (236.2) |  |  | 1.3 |  |  | 0.5 |  |  | (3.2) |  |  | (237.6) |
Tax (expense) benefit | (7.8) |  |  | (1.4) |  |  | — |  |  | 0.4 |  |  | (8.8) |
Other comprehensive income (loss), net of tax | (244.0) |  |  | (0.1) |  |  | 0.5 |  |  | (2.8) |  |  | (246.4) |
Other comprehensive income (loss) attributable to noncontrolling interest | 2.2 |  |  | — |  |  | — |  |  | — |  |  | 2.2 |
Balance as of September 30, 2021 | $ | (1,770.8) |  |  | $ | (104.8) |  |  | $ | 5.2 |  |  | $ | 1.9 |  |  | $ | (1,868.5) |
Three Months Ended September 30, 2020 |  |  |  |  |  |  |  |  |
Balance at June 30, 2020 | $ | (2,016.3) |  |  | $ | (121.8) |  |  | $ | 2.9 |  |  | $ | 22.0 |  |  | $ | (2,113.2) |
Other comprehensive income (loss) | 50.5 |  |  | 2.7 |  |  | 0.5 |  |  | (3.1) |  |  | 50.6 |
Tax (expense) benefit | 9.2 |  |  | (1.8) |  |  | (0.1) |  |  | 0.8 |  |  | 8.1 |
Other comprehensive income (loss), net of tax | 59.7 |  |  | 0.9 |  |  | 0.4 |  |  | (2.3) |  |  | 58.7 |
Other comprehensive income (loss) attributable to noncontrolling interest | 0.7 |  |  | — |  |  | — |  |  | — |  |  | 0.7 |
Balance as of September 30, 2020 | $ | (1,955.9) |  |  | $ | (120.9) |  |  | $ | 3.3 |  |  | $ | 19.7 |  |  | $ | (2,053.8) |
Nine Months Ended September 30, 2021 |  |  |  |  |  |  |  |  |
Balance at December 31, 2020 | $ | (1,719.1) |  |  | $ | (109.7) |  |  | $ | 3.7 |  |  | $ | 18.9 |  |  | $ | (1,806.2) |
Other comprehensive income (loss) | (62.7) |  |  | 3.9 |  |  | 1.5 |  |  | (17.4) |  |  | (74.7) |
Tax (expense) benefit | 9.8 |  |  | 1.0 |  |  | — |  |  | 0.4 |  |  | 11.2 |
Other comprehensive income (loss), net of tax | (52.9) |  |  | 4.9 |  |  | 1.5 |  |  | (17.0) |  |  | (63.5) |
Other comprehensive income (loss) attributable to noncontrolling interest | 1.2 |  |  | — |  |  | — |  |  | — |  |  | 1.2 |
Balance as of September 30, 2021 | $ | (1,770.8) |  |  | $ | (104.8) |  |  | $ | 5.2 |  |  | $ | 1.9 |  |  | $ | (1,868.5) |
Nine Months Ended September 30, 2020 |  |  |  |  |  |  |  |  |
Balance at December 31, 2019 | $ | (1,476.8) |  |  | $ | (129.6) |  |  | $ | 2.1 |  |  | $ | 6.1 |  |  | $ | (1,598.2) |
Other comprehensive income (loss) | (488.9) |  |  | 15 |  |  | 1.5 |  |  | 17.4 |  |  | (455) |
Tax (expense) benefit | 0.5 |  |  | (6.3) |  |  | (0.3) |  |  | (3.8) |  |  | (9.9) |
Other comprehensive income (loss), net of tax | (488.4) |  |  | 8.7 |  |  | 1.2 |  |  | 13.6 |  |  | (464.9) |
Other comprehensive income (loss) attributable to noncontrolling interest | 9.3 |  |  | — |  |  | — |  |  | — |  |  | 9.3 |
Balance as of September 30, 2020 | $ | (1,955.9) |  |  | $ | (120.9) |  |  | $ | 3.3 |  |  | $ | 19.7 |  |  | $ | (2,053.8) |

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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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