Condensed Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Cumulative effect of accounting change of the Joint Venture | ASU 2017-12 [Member]			$ (490)	$ 490
Balance at Mar. 31, 2018	$ 75	$ 1,139,300	34,661	2,536	$ 1,176,572
Balance, shares at Mar. 31, 2018	75,749,118
Equity compensation expense		5,300			5,300
Repurchase of Change Healthcare Inc. common stock		(4,782)			(4,782)
Repurchase of Change Healthcare Inc. common stock, shares	(251,789)
Issuance of Change Healthcare Inc. common stock upon exercise of equity awards, shares	4,045
Net income (loss)			(17,501)		(17,501)
Foreign currency translation adjustment of the Joint Venture				(2,593)	(2,593)
Change in fair value of interest rate cap, net of taxes of the Joint Venture				782	782
Balance at Jun. 30, 2018	$ 75	1,139,818	16,670	1,215	1,157,778
Balance, shares at Jun. 30, 2018	75,501,374
Cumulative effect of accounting change of the Joint Venture | ASC 606 [Member]			35,797		35,797
Cumulative effect of accounting change of the Joint Venture | ASU 2018-02 [Member]			(422)	422
Balance at Mar. 31, 2019	$ 75	1,153,509	(17,841)	(3,256)	1,132,487
Balance, shares at Mar. 31, 2019	75,474,654
Equity compensation expense		5,862			5,862
Net income (loss)			(37,517)		(37,517)
Foreign currency translation adjustment of the Joint Venture				226	226
Change in fair value of interest rate cap, net of taxes of the Joint Venture				(5,431)	(5,431)
Balance at Jun. 30, 2019	$ 75	$ 1,159,371	$ (19,983)	$ (8,039)	$ 1,131,424
Balance, shares at Jun. 30, 2019	75,474,654