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Income Taxes - Balance Sheet Location for Deferred Items and Unrecognized Tax Benefits (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Deferred tax assets and liabilities |  |  |
Other long-term assets | $ 107.1 | $ 96.4 |
Other long-term liabilities | (259.6) | (281.1) |
Net deferred tax liabilities | (152.5) | (184.7) |
Undistributed foreign earnings | 4.6 | 13.6 |
Reconciliation of the beginning and ending amount of unrecognized tax benefits |  |  |
Balance at the beginning of the period | 35.7 | 27.1 | $ 37.0
Additions based on tax positions related to current year | 0.4 | 0.3 | 3.3
Reductions due to statute of limitations | (10.8) | (4.8) | (11.8)
Adjustments related to acquired uncertain tax positions | (0.8) | 11.6 | 0.0
Adjustments for tax positions of prior years | 0.0 | 1.8 | 0.0
Reductions due to settlements | 0.0 | (0.1) | (1.2)
Adjustments due to foreign exchange rates | (0.2) | (0.2) | (0.2)
Balance at the end of the period | 24.3 | 35.7 | 27.1
Uncertain tax position that would impact effective tax rate | 28.1 |  |
Total amount of interest and penalties accrued | 7.9 | 8.9 | $ 5.1
Minimum |  |  |
Reconciliation of the beginning and ending amount of unrecognized tax benefits |  |  |
Decrease in unrecognized tax benefits is reasonably possible | 9.0 |  |
Maximum |  |  |
Reconciliation of the beginning and ending amount of unrecognized tax benefits |  |  |
Decrease in unrecognized tax benefits is reasonably possible | 10.0 |  |
Other long-term assets |  |  |
Deferred tax assets and liabilities |  |  |
Other long-term assets | 3.5 | 3.6 |
Other long-term liabilities |  |  |
Deferred tax assets and liabilities |  |  |
Other long-term liabilities | $ (156.0) | $ (188.3) |

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