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Details of Intangible Assets Included in Other Long-Term Assets (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 9 years 9 months 18 days |
Cost | $ 753 | $ 753
Accumulated Amortization | 417 | 396
Net | $ 336 | 357
Customer contracts/ relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 9 years 9 months 18 days |
Cost | $ 566 | 566
Accumulated Amortization | 307 | 292
Net | $ 259 | 274
Trade names and technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 8 years 3 months 18 days |
Cost | $ 104 | 104
Accumulated Amortization | 58 | 54
Net | $ 46 | 50
Provider contracts |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 14 years 7 months 6 days |
Cost | $ 51 | 51
Accumulated Amortization | 25 | 24
Net | $ 26 | 27
Noncompetes and other |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Life | 8 years 2 months 12 days |
Cost | $ 32 | 32
Accumulated Amortization | 27 | 26
Net | $ 5 | $ 6

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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