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Impairment Losses - Goodwill Balances (Details) - USD ($) | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2017 | Dec. 31, 2016 | Jun. 30, 2017 | Dec. 31, 2016
Goodwill |  |  |  |
Historical goodwill |  |  |  | $ 678,000,000
Accumulated impairment losses |  |  | $ (119,000,000) | (58,000,000)
Goodwill | $ 620,000,000 | $ 620,000,000 | 559,000,000 | 620,000,000
Goodwill |  |  |  |
Beginning balance | 620,000,000 |  |  |
Impairment loss | (61,000,000) | 0 |  |
Ending balance | 559,000,000 | 620,000,000 |  |
Health Plans |  |  |  |
Goodwill |  |  |  |
Historical goodwill |  |  |  | 445,000,000
Accumulated impairment losses |  |  | (58,000,000) | (58,000,000)
Goodwill | 387,000,000 | 387,000,000 | 387,000,000 | 387,000,000
Goodwill |  |  |  |
Beginning balance | 387,000,000 |  |  |
Impairment loss | 0 |  |  |
Ending balance | 387,000,000 | 387,000,000 |  |
Molina Medicaid Solutions |  |  |  |
Goodwill |  |  |  |
Historical goodwill |  |  |  | 71,000,000
Accumulated impairment losses |  |  | 0 | 0
Goodwill | 71,000,000 | 71,000,000 | 71,000,000 | 71,000,000
Goodwill |  |  |  |
Beginning balance | 71,000,000 |  |  |
Impairment loss | 0 |  |  |
Ending balance | 71,000,000 | 71,000,000 |  |
Other segment |  |  |  |
Goodwill |  |  |  |
Historical goodwill |  |  |  | 162,000,000
Accumulated impairment losses |  |  | (61,000,000) | 0
Goodwill | 162,000,000 | 162,000,000 | $ 101,000,000 | $ 162,000,000
Goodwill |  |  |  |
Beginning balance | 162,000,000 |  |  |
Impairment loss | (61,000,000) |  |  |
Ending balance | $ 101,000,000 | $ 162,000,000 |  |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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