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SIGNIFICANT ACCOUNTING POLICIES - ACCRUED AND OTHER LIABILITIES (Details) - USD ($) $ in Millions | 12 Months Ended | 36 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2018
Intangible assets |  |  |  |
Impairment charges related to finite-lived intangible assets | $ 0.0 | $ 0.0 | $ 0.0 |
Impairment charges related to indefinite-lived intangible assets and goodwill for impairment | 0.0 | 0.0 | $ 0.0 | $ 0.0
Accrued and other liabilities |  |  |  |
Payroll and vacation related accruals | 25.7 | 24.7 |  | 25.7
Employee incentives and other related accruals | 19.5 | 17.4 |  | 19.5
Uninsured risks and related liabilities - short term | 9.9 | 15.4 |  | 9.9
Deferred revenues | 5.7 | 5.0 |  | 5.7
Interest on debt | 5.1 | 5.4 |  | 5.1
Multi-employer withdrawal liability - short-term (see Note 12) | 10.8 | 4.1 |  | 10.8
Pension and post-retirement liabilities - short term (see Note 11) | 3.0 | 3.0 |  | 3.0
Other liabilities | 2.2 | 5.4 |  | 2.2
Total | 81.9 | 80.4 |  | 81.9
Other long-term liabilities |  |  |  |
Pension and post-retirement liabilities (see Note 11) | 79.4 | 75.1 |  | 79.4
Multi-employer withdrawal liabilitiy (see Note 12) | 56.6 | 65.1 |  | 56.6
Uninsured risks and related liabilities | 27.3 | 29.5 |  | 27.3
Other long-term liabilities | 14.0 | 8.5 |  | 14.0
Total | $ 177.3 | $ 178.2 |  | $ 177.3
Customer Relationships. | Minimum |  |  |  |
Intangible assets |  |  |  |
Expected useful lives | 3 years |  |  |
Customer Relationships. | Maximum |  |  |  |
Intangible assets |  |  |  |
Expected useful lives | 21 years |  |  |

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