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Income Taxes (Details 4) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred income tax assets: |  |
Personnel accruals | $ 1.5 | $ 1.8
State tax credit carryforward, net | 11.0 | 12.6
Contingent liabilities | 0.1 | 0.1
Other | 0.0 | 2.1
Total gross deferred income tax assets | 12.6 | 16.6
Deferred income tax liabilities: |  |
Property, plant, and equipment | (3.1) | (2.7)
Prepaid expenses | (0.3) | (0.3)
Other | (0.2) | (0.1)
Total gross deferred income tax liabilities | (652.3) | (648.6)
Net deferred income tax liabilities | (639.7) | (632.0)
CVR Partners, LP |  |
Deferred income tax liabilities: |  |
Investment in CVR Partners and CVR Refining | (83.4) | (76.1)
CVR Refining, LP |  |
Deferred income tax liabilities: |  |
Investment in CVR Partners and CVR Refining | $ (565.3) | $ (569.4)

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