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Stock-Based Compensation Programs - PCEQs (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Stock-Based Compensation Programs |  |  |
Share based compensation expense | $ 37.0 | $ 75.0 | $ 46.0
Expenses for share-based compensation arrangements, after tax | 33.0 | 61.0 | 35.0
Unrecognized compensation cost related to nonvested share-based compensation arrangements | $ 50.0 |  |
Expected weighted-average period for recognition of unrecognized stock-based compensation costs | 2 years 2 months 12 days |  |
Special Acquisition Related Incentive Plan [Member] | Business consolidation and other activities |  |  |
Stock-Based Compensation Programs |  |  |
Share based compensation expense | $ 6.0 | 23.0 | 11.0
PCEQs |  |  |
Stock-Based Compensation Programs |  |  |
Vesting period | 3 years |  |
PCEQs | Minimum |  |  |
Stock-Based Compensation Programs |  |  |
Vest range of participant's assigned award opportunity (as a percent) | 0.00% |  |
PCEQs | Maximum |  |  |
Stock-Based Compensation Programs |  |  |
Vest range of participant's assigned award opportunity (as a percent) | 200.00% |  |
PCEQs | Selling, general and administrative |  |  |
Stock-Based Compensation Programs |  |  |
Share based compensation expense | $ 5.0 | $ 21.0 | $ 9.0
PCEQs | Special Acquisition Related Incentive Plan [Member] |  |  |
Stock-Based Compensation Programs |  |  |
Granted (in shares) |  |  | 1.1

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