Equity Method Investment in Change Healthcare LLC (Summarized Financial Information of the Joint Venture) (Details) - USD ($) $ in Thousands	11 Months Ended	12 Months Ended
	Mar. 10, 2020	Mar. 31, 2019	Mar. 31, 2021	Mar. 31, 2020
Schedule of Equity Method Investments [Line Items]
Current assets			$ 1,118,829	$ 1,401,181
Current liabilities			$ 1,047,121	$ 1,059,789
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
Total revenue	$ 3,092,875	$ 3,281,729
Cost of operations (exclusive of depreciation and amortization)	1,263,244	1,354,655
Customer postage	215,448	238,618
Net income (loss)	123,771	$ 176,670
Current assets	1,339,908
Long-term assets	5,187,220
Current liabilities	1,112,875
Long-term liabilities	$ 5,185,304