Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Schedule of revenue sources

The Company's revenues from third-party payers, the uninsured and other sources are summarized in the following table (dollars in millions).

	June 30, 2011					June 30, 2012					June 30, 2013
Medicare	$	994.0		26.8	%	$	1,411.6		27.2	%	$	1,403.4		26.7	%
Medicaid	461.9			12.4		720.6			13.9		708.7			13.5
Managed Medicare	458.6			12.4		538.9			10.4		594.7			11.3
Managed Medicaid	366.7			9.9		492.9			9.5		542.6			10.3
Managed care	1,295.3			34.9		1,794.4			34.6		1,753.7			33.3
Commercial	35.5			1.0		68.8			1.3		83.8			1.6
	3,612.0			97.3		5,027.2			96.8		5,086.9			96.7
Uninsured	271.2			7.3		505.3			9.7		605.9			11.5
Other	131.4			3.5		198.5			3.8		236.8			4.5
Patient service revenues before provision for doubtful accounts	4,014.6			108.1		5,731.0			110.4		5,929.6			112.7
Provision for doubtful accounts	(302.3		)	(8.1	)	(539.4		)	(10.4	)	(667.3		)	(12.7	)
Patient service revenues, net	$	3,712.3		100.0	%	$	5,191.6		100.0	%	$	5,262.3		100.0	%

Allowance for Doubtful Accounts Receivable Rollforward

A summary of the Company’s allowance for doubtful accounts activity, including those for discontinued operations, during the three most recent years follows (in millions).

	Balance at Beginning of Period		Additions Charged to Costs and Expenses		Accounts Written off, Net of Recoveries and Other		Balance at End of Period
Allowance for doubtful accounts:
Year ended June 30, 2011	$	75.6	$	302.3	$	172.9	$	205.0
Year ended June 30, 2012	$	205.0	$	539.4	$	377.9	$	366.5
Year ended June 30, 2013	$	366.5	$	667.3	$	625.7	$	408.1

Property, Plant and Equipment

The following table provides the gross asset balances for each major class of asset and total accumulated depreciation as of June 30, 2012 and 2013 (in millions).

	June 30, 2012			June 30, 2013
Class of asset:
Land and improvements	$	215.9		$	220.4
Buildings and improvements	1,646.9			1,713.7
Equipment	1,135.3			1,298.2
Construction in progress	162.4			382.3
	3,160.5			3,614.6
Less: accumulated depreciation	(1,050.4		)	(1,289.6		)
Net property, plant and equipment	$	2,110.1		$	2,325.0

Schedule of Stock Options, Valuation Assumptions

The following table sets forth the range of assumptions the Company has utilized in the Black-Scholes-Merton model.

Risk-free interest rate	1.24	%	to	5.13%
Dividend yield			0%
Volatility (annual)	26.39	%	to	52.00%
Expected option life			6.25 years