Goodwill And Other Intangible Assets (Changes In Carrying Amount Of Goodwill By Reportable Segment) (Details) (USD $) In Thousands	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009
Beginning Balance	$ 1,992,924	$ 1,963,111
Subsequent payments/adjustments related to 2008 acquisitions	36,592	29,813
Acquisitions	538,293
Ending Balance	2,567,809	1,992,924
Retail [Member]
Beginning Balance	564,983	547,896
Subsequent payments/adjustments related to 2008 acquisitions	27,861	17,087
Acquisitions	0
Ending Balance	592,844	564,983
Employer Group [Member]
Beginning Balance	53,259	40,533
Subsequent payments/adjustments related to 2008 acquisitions	8,731	12,726
Acquisitions	0
Ending Balance	61,990	53,259
Health And Well-Being Services [Member]
Beginning Balance	1,317,229	1,317,229
Subsequent payments/adjustments related to 2008 acquisitions	0	0
Acquisitions	538,293
Ending Balance	1,855,522	1,317,229
Other Businesses [Member]
Beginning Balance	57,453	57,453
Subsequent payments/adjustments related to 2008 acquisitions	0	0
Acquisitions	0
Ending Balance	$ 57,453	$ 57,453

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

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-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 Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-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 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 34

-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 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-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.

+ Details