| **Property and Equipment**                   | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         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| **Property, Plant and Equipment [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    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| Property and Equipment                       | Property and Equipment:Property and equipment consists of the following (in millions): As of December 31, 2011 2010Land$66.9 $63.4Buildings901.4 885.6Leasehold improvements59.6 43.1Furniture, fixtures, and equipment313.0 300.2 1,340.9 1,292.3Less: Accumulated depreciation and amortization(686.9) (674.3) 654.0 618.0Construction in progress10.4 14.9Property and equipment, net$664.4 $632.9Information related to fully depreciated assets and assets under capital lease obligations is as follows (in millions): As of December 31, 2011 2010Fully depreciated assets$221.9 $200.8Assets under capital lease obligations:   Buildings$161.5 $197.2Equipment0.2 0.2 161.7 197.4Accumulated amortization(100.3) (124.9)Assets under capital lease obligations, net$61.4 $72.5The amount of depreciation expense, amortization expense relating to assets under capital lease obligations, interest capitalized, and rent expense under operating leases is as follows (in millions): For the Year Ended December 31, 2011 2010 2009Depreciation expense$52.5 $48.1 $43.4Amortization expense$11.1 $12.1 $12.3Interest capitalized$0.5 $0.4 $—Rent expense:     Minimum rent payments$38.5 $39.9 $33.2Contingent and other rents24.2 18.8 24.8Other4.2 4.7 4.2Total rent expense$66.9 $63.4 $62.2Corporate Campus—In March 2008, we completed a transaction with Daniel Corporation (“Daniel”), a Birmingham, Alabama-based full-service real estate organization, by which Daniel acquired our corporate campus, including the Digital Hospital, an incomplete 13-story building located on the property, for a purchase price of $43.5 million in cash. As part of this transaction, we entered into a lease for office space within the property that was sold. The sale agreement includes a deferred purchase price component related to the Digital Hospital. If Daniel sells, or otherwise monetizes its interest in, the Digital Hospital for cash consideration to a third party, we are entitled to 40% of the net profit, if any and as defined in the sale agreement, realized by Daniel. In September 2008, Daniel announced it had reached an agreement with Trinity Medical Center (“Trinity”) pursuant to which Trinity will acquire the Digital Hospital. The purchase price of this transaction has not been made public, and the transaction is subject to Trinity receiving approval for a certificate of need (“CON”) from the applicable state board in Alabama. Although the CON has been granted to Trinity, the hospitals opposing Trinity's CON have appealed the board's ruling, and the Circuit Court of Montgomery County, Alabama is currently considering the appeal under the parameters established by the Alabama Court of Civil Appeals for this case. Therefore, no assurances can be given as to whether or when we might receive any cash flows related to the deferred purchase price component of our agreement with Daniel.Leases—We lease certain land, buildings, and equipment under non-cancelable operating leases generally expiring at various dates through 2025. We also lease certain buildings and equipment under capital leases generally expiring at various dates through 2027. Operating leases generally have 3- to 15-year terms, with one or more renewal options, with terms to be negotiated at the time of renewal. Various facility leases include provisions for rent escalation to recognize increased operating costs or require us to pay certain maintenance and utility costs. Contingent rents are included in rent expense in the year incurred.Some facilities are subleased to other parties. Rental income from subleases approximated $4.7 million, $4.4 million, and $4.9 million for the years ended December 31, 2011, 2010, and 2009, respectively. Total expected future minimum rentals under these noncancelable subleases approximated $14.9 million as of December 31, 2011.Certain leases contain annual escalation clauses based on changes in the Consumer Price Index while others have fixed escalation terms. The excess of cumulative rent expense (recognized on a straight-line basis) over cumulative rent payments made on leases with fixed escalation terms is recognized as straight-line rental accrual and is included in Other long-term liabilities in the accompanying consolidated balance sheets, as follows (in millions): As of December 31, 2011 2010Straight-line rental accrual$7.8 $8.0Future minimum lease payments at December 31, 2011, for those leases having an initial or remaining non-cancelable lease term in excess of one year, are as follows (in millions):Year Ending December 31, Operating Leases Capital Lease Obligations Total2012 $41.1 $16.2 $57.32013 38.4 15.0 53.42014 32.5 10.5 43.02015 28.1 8.9 37.02016 22.6 8.6 31.22017 and thereafter 106.7 59.7 166.4  $269.4 118.9 $388.3Less: Interest portion   (43.0)  Obligations under capital leases   $75.9  In addition to the above, and as discussed in Note 8,Long-term Debt, “Other Notes Payable,” we have two sale/leaseback transactions involving real estate accounted for as financings. Future minimum payments, which are accounted for as interest, under these obligations are $2.7 million in each of the next five years and $19.4 million thereafter. |

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| - Definition
The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230
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