Acquisitions	12 Months Ended
Dec. 31, 2011
Acquisitions [Abstract]
Acquisitions	3. ACQUISITIONS Effective December 30, 2011, we acquired the California-based Medicare Advantage health maintenance organization (HMO) MD Care, Inc., or MD Care. This acquisition expanded our Medicare footprint in California and grew our Medicare enrollment. On December 6, 2011, we acquired Anvita, Inc., or Anvita, a San Diego-based health care analytics company. The Anvita acquisition provides scalable analytics solutions that produce clinical insights which we expect to enhance our ability to improve the quality and lower the cost of health care for our members and customers. The preliminary allocation of the purchase price resulted in goodwill of $117 million and other intangible assets of $60 million. The goodwill was assigned to the Retail segment and is not deductible for tax purposes. The other intangible assets, which primarily consist of technology and customer contracts, have a weighted average useful life of 6.5 years. The purchase price allocation is preliminary, subject to completion of valuation analyses, including, for example, refining assumptions used to calculate the fair value of other intangible assets. On December 21, 2010, we acquired Concentra Inc., or Concentra, a health care company based in Addison, Texas, for $805 million. During 2011, we accrued and paid $6 million related to the final determination of working capital that existed at the acquisition date and recorded immaterial adjustments to the acquisition date fair value of Concentra's net tangible assets acquired with a corresponding adjustment to goodwill. Through its affiliated clinicians, Concentra delivers occupational medicine, urgent care, physical therapy, and wellness services to workers and the general public through its operation of medical centers and worksite medical facilities. The Concentra acquisition provides us entry into the primary care space on a national scale, offering additional means for achieving health and wellness solutions and providing an expandable platform for growth with a management team experienced in physician asset management and alternate site care. The total consideration of $811 million exceeded our estimated fair value of the net tangible assets acquired by approximately $725 million, of which we allocated $188 million to other intangible assets and $537 million to goodwill. The goodwill was assigned to the Health and Well-Being Services segment. The other intangible assets, which primarily consist of customer relationships and trade name, have a weighted average useful life of 13.7 years. Approximately $58 million of the acquired goodwill is deductible for tax purposes. The results of operations and financial condition of MD Care, Anvita, and Concentra have been included in our consolidated statements of comprehensive income and consolidated balance sheets from the acquisition dates. Acquisition-related costs recognized in connection with these acquisitions were not material. The pro forma financial information assuming the acquisitions had occurred as of January 1, 2010 was not material to our results of operations. During the second half of 2011, we entered into definitive agreements to acquire Arcadian Management Services, Inc., or Arcadian, a Medicare Advantage HMO, and SeniorBridge, a chronic-care provider providing in-home care for seniors. Arcadian serves Medicare Advantage HMO members in 15 U.S. states, offering us an opportunity to expand our Medicare footprint and grow our Medicare enrollment. SeniorBridge will expand our existing clinical and home health capabilities and strengthen our offerings for members with complex chronic-care needs. The closings of these acquisitions are subject to federal and/or state regulatory approvals.

Acquisitions

12 Months Ended

Dec. 31, 2011

3. ACQUISITIONS

Effective December 30, 2011, we acquired the California-based Medicare Advantage health maintenance organization (HMO) MD Care, Inc., or MD Care. This acquisition expanded our Medicare footprint in California and grew our Medicare enrollment.

On December 6, 2011, we acquired Anvita, Inc., or Anvita, a San Diego-based health care analytics company. The Anvita acquisition provides scalable analytics solutions that produce clinical insights which we expect to enhance our ability to improve the quality and lower the cost of health care for our members and customers. The preliminary allocation of the purchase price resulted in goodwill of $117 million and other intangible assets of $60 million. The goodwill was assigned to the Retail segment and is not deductible for tax purposes. The other intangible assets, which primarily consist of technology and customer contracts, have a weighted average useful life of 6.5 years. The purchase price allocation is preliminary, subject to completion of valuation analyses, including, for example, refining assumptions used to calculate the fair value of other intangible assets.

On December 21, 2010, we acquired Concentra Inc., or Concentra, a health care company based in Addison, Texas, for $805 million. During 2011, we accrued and paid $6 million related to the final determination of working capital that existed at the acquisition date and recorded immaterial adjustments to the acquisition date fair value of Concentra's net tangible assets acquired with a corresponding adjustment to goodwill. Through its affiliated clinicians, Concentra delivers occupational medicine, urgent care, physical therapy, and wellness services to workers and the general public through its operation of medical centers and worksite medical facilities. The Concentra acquisition provides us entry into the primary care space on a national scale, offering additional means for achieving health and wellness solutions and providing an expandable platform for growth with a management team experienced in physician asset management and alternate site care. The total consideration of $811 million exceeded our estimated fair value of the net tangible assets acquired by approximately $725 million, of which we allocated $188 million to other intangible assets and $537 million to goodwill. The goodwill was assigned to the Health and Well-Being Services segment. The other intangible assets, which primarily consist of customer relationships and trade name, have a weighted average useful life of 13.7 years. Approximately $58 million of the acquired goodwill is deductible for tax purposes.

The results of operations and financial condition of MD Care, Anvita, and Concentra have been included in our consolidated statements of comprehensive income and consolidated balance sheets from the acquisition dates. Acquisition-related costs recognized in connection with these acquisitions were not material. The pro forma financial information assuming the acquisitions had occurred as of January 1, 2010 was not material to our results of operations.

During the second half of 2011, we entered into definitive agreements to acquire Arcadian Management Services, Inc., or Arcadian, a Medicare Advantage HMO, and SeniorBridge, a chronic-care provider providing in-home care for seniors. Arcadian serves Medicare Advantage HMO members in 15 U.S. states, offering us an opportunity to expand our Medicare footprint and grow our Medicare enrollment. SeniorBridge will expand our existing clinical and home health capabilities and strengthen our offerings for members with complex chronic-care needs. The closings of these acquisitions are subject to federal and/or state regulatory approvals.