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CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Parenthetical) $ in Millions | 6 Months Ended | 12 Months Ended
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Jun. 30, 2016 USD ($) $ / shares | Dec. 31, 2015 USD ($) $ / shares
Statement of Stockholders' Equity [Abstract] |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.01 | $ 0.01
CVR Partner's common units issuance for mergers, tax | $ 20.0 | $ 20.0
Tax on unrealized gain on available for sale securities | $ 0.2 | $ 0.2

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