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Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss (Notes) | 12 Months Ended
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Dec. 31, 2019
Statement of Other Comprehensive Income [Abstract] |
Accumulated Other Comprehensive Loss [Text Block] | ACCUMULATED OTHER COMPREHENSIVE LOSS
| Postretirement Benefit Plans |  | Cumulative Translation Adjustment |  | Accumulated Other Comprehensive Loss
As of December 31, 2016 | $ | (145.2 | ) |  | $ | (306.0 | ) |  | $ | (451.2 | )
Net change during period | 7.6 |  |  | 95.4 |  |  | 103.0 |
As of December 31, 2017 | (137.6 | ) |  | (210.6 | ) |  | (348.2 | )
Net change during period | 6.0 |  |  | (33.3 | ) |  | (27.3 | )
As of December 31, 2018 | (131.6 | ) |  | (243.9 | ) |  | (375.5 | )
Net change during period | (1.7 | ) |  | (8.1 | ) |  | (9.8 | )
As of December 31, 2019 | $ | (133.3 | ) |  | $ | (252.0 | ) |  | $ | (385.3 | )

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