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Business Combinations (Tables) | 12 Months Ended
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Dec. 31, 2016
Business Combinations [Abstract] |
Intangible Assets Acquired Identified by Segment | The following table presents the intangible assets identified in the transactions described above. The weighted-average amortization period, in the aggregate, is 5.7 years.
| Fair Value |  | Life
| (In millions) |  | (Years)
Intangible asset type: |  |  |
Contract rights - member list | $ | 38 |  |  | 5
Provider network | 7 |  |  | 10
| $ | 45 |  |  |

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- Definition Tabular disclosure of finite-lived intangible assets acquired as part of a business combination or through an asset purchase, by major class and in total, including the value of the asset acquired, any significant residual value (the expected value of the asset at the end of its useful life) and the weighted-average amortization period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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