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INCOME TAXES - Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Deferred income tax assets: |  |
Net operating and capital loss carryforwards | $ 286.1 | $ 285.1
Goodwill and intangible assets | 128.0 | 119.1
Employee compensation programs | 62.7 | 40.5
Foreign tax credits | 17.4 | 16.6
Employee pension benefits | 34.6 | 31.1
Reserves and accrued expenses | 17.6 | 14.9
Accrued legal expense | 94.9 | 136.3
Research and development costs | 33.0 | 32.4
Operating lease asset | 23.1 | 26.6
Other | 11.8 | 18.3
Gross deferred income tax assets | 709.2 | 720.9
Valuation allowance | (382.7) | (379.8)
Total deferred income tax assets, net | 326.5 | 341.1
Deferred income tax liabilities: |  |
Goodwill and intangible assets | (540.7) | (472.5)
Undistributed earnings of foreign subsidiaries | (11.3) | (8.3)
Depreciation | (19.1) | (33.6)
Operating lease liability | (23.1) | (26.6)
Accrued insurance | 0.0 | (27.5)
Prepaid expenses | (11.6) | (8.1)
Investment basis difference | (41.5) | (1.2)
Other | (2.3) | (2.1)
Total deferred income tax liability | (649.6) | (579.9)
Net deferred income tax liability | $ (323.1) | $ (238.8)

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