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Shareholders Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions					3 Months Ended
	May 13, 2019	Apr. 24, 2019	Mar. 11, 2019	Feb. 20, 2019	Mar. 31, 2019	Mar. 31, 2018
Dividends Payable [Line Items]
Dividends declared (in dollars per share)				$ 0.75	$ 0.75	$ 0.50
Dividends declared				$ 75.0	$ 75.0	$ 43.0
Distribution paid			$ 5.0
Majority Shareholder
Dividends Payable [Line Items]
Dividends declared			$ 54.0
CVR Partners
Dividends Payable [Line Items]
Distribution paid (in dollars per share)			$ 0.12
Distribution paid			$ 13.9
Subsequent Event
Dividends Payable [Line Items]
Dividends declared (in dollars per share)		$ 0.75
Dividends declared		$ 75.0
Proceeds from distribution	$ 3.0
Subsequent Event | Majority Shareholder
Dividends Payable [Line Items]
Dividends declared	$ 54.0
Subsequent Event | CVR Partners
Dividends Payable [Line Items]
Distributions declared (in dollars per share)		$ 0.07
Distributions declared		$ 8.0

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Aggregate dividends declared during the period for each share of common stock outstanding.

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