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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 | $ 111.0 | $ 99.3 |
Other long-term liabilities | (281.4) | (303.4) |
Net deferred tax liabilities | (170.4) | (204.1) |
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 | 35.9 | 27.3 | $ 37.4
Additions based on tax positions related to current year | 0.4 | 0.3 | 3.3
Reductions due to statute of limitations | (10.8) | (5.0) | (12.0)
Adjustments related to acquired uncertain tax positions | (0.8) | 11.6 | 0.0
Adjustments for tax positions of prior years | 0.0 | 2.0 | 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 | 24.5 | 35.9 | 27.3
Uncertain tax position that would impact effective tax rate | 28.6 |  |
Total amount of interest and penalties accrued | 8.2 | 9.2 | $ 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 | $ (173.9) | $ (207.7) |

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