Business Combinations (Acquistion of Valley Baptist) (Details) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2013 Beds	Jun. 30, 2012	Sep. 01, 2011 Valley Baptist [Member]	Sep. 01, 2011 Valley Baptist Medical Center [Member] Beds	Sep. 01, 2011 Valley Baptist Medical Center - Brownsville [Member] Beds
Business Acquisition [Line Items]
Number of beds	7,081			586	280
Business Acquisition, Cost of Acquired Entity [Abstract]
Cash paid			$ 200.5
Noncontrolling interest in the partnership issued to the seller			49.00%
Number of shares to be issued upon redemption of noncontrolling interest			5,434,000
Business Acquisition, Purchase Price Allocation [Abstract]
Accounts receivable			40.0
Inventories			7.2
Prepaid expenses and other current assets			22.8
Property and equipment			244.5
Goodwill	789.9	768.4	7.0
Other assets			11.0
Total assets acquired			332.5
Accounts payable			29.7
Other current liabilities			24.7
Other long-term liabilities			14.3
Long-term debt and capital leases			12.6
Redeemable non-controlling interest			51.2
Non-controlling interests			(0.5)
Total liabilities and non-controlling interests assumed			132.0
Net assets acquired			$ 200.5