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Accumulated other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 31, 2023
Accumulated Other Comprehensive Income [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The following table sets forth the changes in AOCI by component during the years ended December 31, 2023, 2022 and 2021:
(in millions) | 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
Balance at December 31, 2020 | $ | (1,719.1) |  |  | $ | (109.7) |  |  | $ | 3.7 |  |  | $ | 18.9 |  |  | (1,806.2) |
Other comprehensive income (loss) | (117.0) |  |  | 56.5 |  |  | 2.0 |  |  | (22.7) |  |  | (81.2) |
Tax (expense) or benefit | 8.8 |  |  | (19.6) |  |  | (0.5) |  |  | 5.1 |  |  | (6.2) |
Other comprehensive income (loss), net of tax | (108.2) |  |  | 36.9 |  |  | 1.5 |  |  | (17.6) |  |  | (87.4) |
Addback: loss attributable to noncontrolling interest | 1.8 |  |  | — |  |  | — |  |  | — |  |  | 1.8 |
Balance at December 31, 2021 | $ | (1,825.5) |  |  | $ | (72.8) |  |  | $ | 5.2 |  |  | $ | 1.3 |  |  | $ | (1,891.8) |
Other comprehensive income (loss) | (261.1) |  |  | 28.6 |  |  | 2.0 |  |  | (32.4) |  |  | (262.9) |
Tax (expense) or benefit | 6.1 |  |  | (8.9) |  |  | (0.5) |  |  | 7.6 |  |  | 4.3 |
Other comprehensive income (loss), net of tax | (255.0) |  |  | 19.7 |  |  | 1.5 |  |  | (24.8) |  |  | (258.6) |
Less: gain attributable to noncontrolling interest | (1.8) |  |  | — |  |  | — |  |  | — |  |  | (1.8) |
Balance at December 31, 2022 | $ | (2,082.3) |  |  | $ | (53.1) |  |  | $ | 6.7 |  |  | $ | (23.5) |  |  | $ | (2,152.2) |
Other comprehensive income (loss) | 152.0 |  |  | 31.1 |  |  | 1.8 |  |  | 30.6 |  |  | 215.5 |
Tax (expense) or benefit | 2.1 |  |  | (11.0) |  |  | (0.4) |  |  | (6.9) |  |  | (16.2) |
Other comprehensive income (loss), net of tax | 154.1 |  |  | 20.1 |  |  | 1.4 |  |  | 23.7 |  |  | 199.3 |
Less: gain attributable to noncontrolling interest | (2.0) |  |  | — |  |  | — |  |  | — |  |  | (2.0) |
Balance at December 31, 2023 | $ | (1,930.2) |  |  | $ | (33.0) |  |  | $ | 8.1 |  |  | $ | 0.2 |  |  | $ | (1,954.9) |

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