Earnings Per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share [Abstract]
Income (loss) from continuing operations									$ 61.8	$ 57.8	$ (6.1)
Loss from discontinued operations									0.1	(0.5)	(5.9)
Accretion of redeemable non-controlling interest, net of taxes									(2.0)	(1.1)	0
Net income (loss) attributable to Vanguard Health Systems, Inc. stockholders									$ 59.9	$ 56.2	$ (12.0)
Weighted average common shares outstanding									77,146,000	75,255,000	45,329,000
Effect of dilutive securities, shares									2,533,000	3,618,000	0
Weighted average diluted shares outstanding									79,679,000	78,873,000	45,329,000
Basic earnings (loss) from continuing operations, per share									$ 0.78	$ 0.76	$ (0.13)
Basic loss from discontinued operations, per share									$ 0.00	$ (0.01)	$ (0.13)
Earnings (loss) per share, basic	$ 0.19	$ 0.27	$ 0.15	$ 0.18	$ 0.25	$ 0.58	$ 0.21	$ (0.29)	$ 0.78	$ 0.75	$ (0.26)
Diluted earnings (loss) from continuing operations, per share									$ 0.75	$ 0.72	$ (0.13)
Diluted loss from discontinued operations, per share									$ 0.00	$ (0.01)	$ (0.13)
Earnings (loss) per share, diluted	$ 0.18	$ 0.26	$ 0.14	$ 0.17	$ 0.24	$ 0.55	$ 0.20	$ (0.29)	$ 0.75	$ 0.71	$ (0.26)
Antidilutive shares excluded from computation of earnings per share									3,140,261	4,377,280