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SEGMENT INFORMATION (Tables) | 6 Months Ended
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Jun. 30, 2017
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, By Segment | Intersegment sales and expenses are recorded at fair value and eliminated in consolidation. Members served by our segments often use the same provider networks, enabling us in some instances to obtain more favorable contract terms with providers. Our segments also share indirect costs and assets. As a result, the profitability of each segment is interdependent. We allocate most operating expenses to our segments. Assets and certain corporate income and expenses are not allocated to the segments, including the portion of investment income not supporting segment operations, interest expense on corporate debt, and certain other corporate expenses. These items are managed at a corporate level. These corporate amounts are reported separately from our reportable segments and are included with intersegment eliminations in the tables presenting segment results below. Our segment results were as follows for the three and six months ended June 30, 2017 and 2016:
| Retail |  | Group and Specialty |  | Healthcare Services |  | Individual Commercial |  | Other Businesses |  | Eliminations/ Corporate |  | Consolidated
| (in millions)
Three months ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Revenues - external customers |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums: |  |  |  |  |  |  |  |  |  |  |  |  |
Individual Medicare Advantage | $ | 8,282 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 8,282 |
Group Medicare Advantage | 1,277 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,277 |
Medicare stand-alone PDP | 925 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 925 |
Total Medicare | 10,484 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 10,484 |
Fully-insured | 118 |  |  | 1,350 |  |  | — |  |  | 247 |  |  | — |  |  | — |  |  | 1,715 |
Specialty | — |  |  | 323 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 323 |
Medicaid and other | 671 |  |  | — |  |  | — |  |  | — |  |  | 10 |  |  | — |  |  | 681 |
Total premiums | 11,273 |  |  | 1,673 |  |  | — |  |  | 247 |  |  | 10 |  |  | — |  |  | 13,203 |
Services revenue: |  |  |  |  |  |  |  |  |  |  |  |  |
Provider | — |  |  | — |  |  | 63 |  |  | — |  |  | — |  |  | — |  |  | 63 |
ASO and other | 2 |  |  | 143 |  |  | — |  |  | — |  |  | 2 |  |  | — |  |  | 147 |
Pharmacy | — |  |  | — |  |  | 20 |  |  | — |  |  | — |  |  | — |  |  | 20 |
Total services revenue | 2 |  |  | 143 |  |  | 83 |  |  | — |  |  | 2 |  |  | — |  |  | 230 |
Total revenues - external customers | 11,275 |  |  | 1,816 |  |  | 83 |  |  | 247 |  |  | 12 |  |  | — |  |  | 13,433 |
Intersegment revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Services | — |  |  | 5 |  |  | 4,309 |  |  | — |  |  | — |  |  | (4,314 | ) |  | — |
Products | — |  |  | — |  |  | 1,582 |  |  | — |  |  | — |  |  | (1,582 | ) |  | — |
Total intersegment revenues | — |  |  | 5 |  |  | 5,891 |  |  | — |  |  | — |  |  | (5,896 | ) |  | — |
Investment income | 24 |  |  | 7 |  |  | 8 |  |  | 1 |  |  | 21 |  |  | 40 |  |  | 101 |
Total revenues | 11,299 |  |  | 1,828 |  |  | 5,982 |  |  | 248 |  |  | 33 |  |  | (5,856 | ) |  | 13,534 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |
Benefits | 9,672 |  |  | 1,312 |  |  | — |  |  | 86 |  |  | 32 |  |  | (213 | ) |  | 10,889 |
Operating costs | 963 |  |  | 394 |  |  | 5,677 |  |  | 40 |  |  | 2 |  |  | (5,623 | ) |  | 1,453 |
Depreciation and amortization | 57 |  |  | 21 |  |  | 35 |  |  | 4 |  |  | — |  |  | (25 | ) |  | 92 |
Total operating expenses | 10,692 |  |  | 1,727 |  |  | 5,712 |  |  | 130 |  |  | 34 |  |  | (5,861 | ) |  | 12,434 |
Income (loss) from operations | 607 |  |  | 101 |  |  | 270 |  |  | 118 |  |  | (1 | ) |  | 5 |  |  | 1,100 |
Interest expense | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 58 |  |  | 58 |
Income (loss) before income taxes | $ | 607 |  |  | $ | 101 |  |  | $ | 270 |  |  | $ | 118 |  |  | $ | (1 | ) |  | $ | (53 | ) |  | $ | 1,042 |
| Retail |  | Group and Specialty |  | Healthcare Services |  | Individual Commercial |  | Other Businesses |  | Eliminations/ Corporate |  | Consolidated
| (in millions)
Three months ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |
Revenues - external customers |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums: |  |  |  |  |  |  |  |  |  |  |  |  |
Individual Medicare Advantage | $ | 8,050 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 8,050 |
Group Medicare Advantage | 1,085 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,085 |
Medicare stand-alone PDP | 1,015 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,015 |
Total Medicare | 10,150 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 10,150 |
Fully-insured | 106 |  |  | 1,357 |  |  | — |  |  | 1,024 |  |  | — |  |  | — |  |  | 2,487 |
Specialty | — |  |  | 321 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 321 |
Medicaid and other | 678 |  |  | 5 |  |  | — |  |  | — |  |  | 9 |  |  | — |  |  | 692 |
Total premiums | 10,934 |  |  | 1,683 |  |  | — |  |  | 1,024 |  |  | 9 |  |  | — |  |  | 13,650 |
Services revenue: |  |  |  |  |  |  |  |  |  |  |  |  |
Provider | — |  |  | — |  |  | 74 |  |  | — |  |  | — |  |  | — |  |  | 74 |
ASO and other | 2 |  |  | 176 |  |  | — |  |  | — |  |  | 3 |  |  | — |  |  | 181 |
Pharmacy | — |  |  | — |  |  | 7 |  |  | — |  |  | — |  |  | — |  |  | 7 |
Total services revenue | 2 |  |  | 176 |  |  | 81 |  |  | — |  |  | 3 |  |  | — |  |  | 262 |
Total revenues - external customers | 10,936 |  |  | 1,859 |  |  | 81 |  |  | 1,024 |  |  | 12 |  |  | — |  |  | 13,912 |
Intersegment revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Services | — |  |  | 6 |  |  | 4,767 |  |  | — |  |  | — |  |  | (4,773 | ) |  | — |
Products | — |  |  | — |  |  | 1,433 |  |  | — |  |  | — |  |  | (1,433 | ) |  | — |
Total intersegment revenues | — |  |  | 6 |  |  | 6,200 |  |  | — |  |  | — |  |  | (6,206 | ) |  | — |
Investment income | 22 |  |  | 6 |  |  | 7 |  |  | 1 |  |  | 16 |  |  | 43 |  |  | 95 |
Total revenues | 10,958 |  |  | 1,871 |  |  | 6,288 |  |  | 1,025 |  |  | 28 |  |  | (6,163 | ) |  | 14,007 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |
Benefits | 9,327 |  |  | 1,302 |  |  | — |  |  | 1,089 |  |  | 31 |  |  | (240 | ) |  | 11,509 |
Operating costs | 1,069 |  |  | 423 |  |  | 5,974 |  |  | 152 |  |  | 4 |  |  | (5,923 | ) |  | 1,699 |
Merger termination fee and related costs, net | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 27 |  |  | 27 |
Depreciation and amortization | 48 |  |  | 22 |  |  | 35 |  |  | 9 |  |  | — |  |  | (25 | ) |  | 89 |
Total operating expenses | 10,444 |  |  | 1,747 |  |  | 6,009 |  |  | 1,250 |  |  | 35 |  |  | (6,161 | ) |  | 13,324 |
Income (loss) from operations | 514 |  |  | 124 |  |  | 279 |  |  | (225 | ) |  | (7 | ) |  | (2 | ) |  | 683 |
Interest expense | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 47 |  |  | 47 |
Income (loss) before income taxes | $ | 514 |  |  | $ | 124 |  |  | $ | 279 |  |  | $ | (225 | ) |  | $ | (7 | ) |  | $ | (49 | ) |  | $ | 636 |
| Retail |  | Group and Specialty |  | Healthcare Services |  | Individual Commercial |  | Other Businesses |  | Eliminations/ Corporate |  | Consolidated
| (in millions)
Six months ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Revenues - external customers |  |  |  |  |  |  |  |  |  |  |  |
Premiums: |  |  |  |  |  |  |  |  |  |  |  |  |
Individual Medicare Advantage | $ | 16,658 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 16,658 |
Group Medicare Advantage | 2,595 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,595 |
Medicare stand-alone PDP | 1,866 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,866 |
Total Medicare | 21,119 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 21,119 |
Fully-insured | 236 |  |  | 2,728 |  |  | — |  |  | 530 |  |  | — |  |  | — |  |  | 3,494 |
Specialty | — |  |  | 645 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 645 |
Medicaid and other | 1,324 |  |  | — |  |  | — |  |  | — |  |  | 19 |  |  | — |  |  | 1,343 |
Total premiums | 22,679 |  |  | 3,373 |  |  | — |  |  | 530 |  |  | 19 |  |  | — |  |  | 26,601 |
Services revenue: |  |  |  |  |  |  |  |  |  |  |  |  |
Provider | — |  |  | — |  |  | 133 |  |  | — |  |  | — |  |  | — |  |  | 133 |
ASO and other | 4 |  |  | 304 |  |  | — |  |  | — |  |  | 4 |  |  | — |  |  | 312 |
Pharmacy | — |  |  | — |  |  | 38 |  |  | — |  |  | — |  |  | — |  |  | 38 |
Total services revenue | 4 |  |  | 304 |  |  | 171 |  |  | — |  |  | 4 |  |  | — |  |  | 483 |
Total revenues - external customers | 22,683 |  |  | 3,677 |  |  | 171 |  |  | 530 |  |  | 23 |  |  | — |  |  | 27,084 |
Intersegment revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Services | — |  |  | 10 |  |  | 8,619 |  |  | — |  |  | — |  |  | (8,629 | ) |  | — |
Products | — |  |  | — |  |  | 3,134 |  |  | — |  |  | — |  |  | (3,134 | ) |  | — |
Total intersegment revenues | — |  |  | 10 |  |  | 11,753 |  |  | — |  |  | — |  |  | (11,763 | ) |  | — |
Investment income | 49 |  |  | 18 |  |  | 16 |  |  | 2 |  |  | 42 |  |  | 85 |  |  | 212 |
Total revenues | 22,732 |  |  | 3,705 |  |  | 11,940 |  |  | 532 |  |  | 65 |  |  | (11,678 | ) |  | 27,296 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |
Benefits | 19,723 |  |  | 2,598 |  |  | — |  |  | 242 |  |  | 61 |  |  | (409 | ) |  | 22,215 |
Operating costs | 1,917 |  |  | 793 |  |  | 11,357 |  |  | 102 |  |  | 6 |  |  | (11,169 | ) |  | 3,006 |
Merger termination fee and related costs, net | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (947 | ) |  | (947 | )
Depreciation and amortization | 115 |  |  | 42 |  |  | 69 |  |  | 7 |  |  | — |  |  | (49 | ) |  | 184 |
Total operating expenses | 21,755 |  |  | 3,433 |  |  | 11,426 |  |  | 351 |  |  | 67 |  |  | (12,574 | ) |  | 24,458 |
Income (loss) from operations | 977 |  |  | 272 |  |  | 514 |  |  | 181 |  |  | (2 | ) |  | 896 |  |  | 2,838 |
Interest expense | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 107 |  |  | 107 |
Income (loss) before income taxes | $ | 977 |  |  | $ | 272 |  |  | $ | 514 |  |  | $ | 181 |  |  | $ | (2 | ) |  | $ | 789 |  |  | $ | 2,731 |
| Retail |  | Group and Specialty |  | Healthcare Services |  | Individual Commercial |  | Other Businesses |  | Eliminations/ Corporate |  | Consolidated
| (in millions)
Six months ended June 30, 2016 |  |  |  |  |  |  |  |  |  |
Revenues - external customers |  |  |  |  |  |  |  |  |  |  |  |
Premiums: |  |  |  |  |  |  |  |  |  |  |  |  |
Individual Medicare Advantage | $ | 16,077 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 16,077 |
Group Medicare Advantage | 2,162 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,162 |
Medicare stand-alone PDP | 2,054 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,054 |
Total Medicare | 20,293 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 20,293 |
Fully-insured | 210 |  |  | 2,694 |  |  | — |  |  | 1,917 |  |  | — |  |  | — |  |  | 4,821 |
Specialty | — |  |  | 639 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 639 |
Medicaid and other | 1,308 |  |  | 10 |  |  | — |  |  | — |  |  | 19 |  |  | — |  |  | 1,337 |
Total premiums | 21,811 |  |  | 3,343 |  |  | — |  |  | 1,917 |  |  | 19 |  |  | — |  |  | 27,090 |
Services revenue: |  |  |  |  |  |  |  |  |  |  |  |  |
Provider | — |  |  | — |  |  | 145 |  |  | — |  |  | — |  |  | — |  |  | 145 |
ASO and other | 3 |  |  | 353 |  |  | 1 |  |  | — |  |  | 6 |  |  | — |  |  | 363 |
Pharmacy | — |  |  | — |  |  | 14 |  |  | — |  |  | — |  |  | — |  |  | 14 |
Total services revenue | 3 |  |  | 353 |  |  | 160 |  |  | — |  |  | 6 |  |  | — |  |  | 522 |
Total revenues - external customers | 21,814 |  |  | 3,696 |  |  | 160 |  |  | 1,917 |  |  | 25 |  |  | — |  |  | 27,612 |
Intersegment revenues |  |  |  |  |  |  |  |  |  |  |  |  |
Services | — |  |  | 12 |  |  | 9,551 |  |  | — |  |  | — |  |  | (9,563 | ) |  | — |
Products | — |  |  | — |  |  | 2,793 |  |  | — |  |  | — |  |  | (2,793 | ) |  | — |
Total intersegment revenues | — |  |  | 12 |  |  | 12,344 |  |  | — |  |  | — |  |  | (12,356 | ) |  | — |
Investment income | 46 |  |  | 12 |  |  | 14 |  |  | 3 |  |  | 31 |  |  | 89 |  |  | 195 |
Total revenues | 21,860 |  |  | 3,720 |  |  | 12,518 |  |  | 1,920 |  |  | 56 |  |  | (12,267 | ) |  | 27,807 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |
Benefits | 18,960 |  |  | 2,524 |  |  | — |  |  | 1,818 |  |  | 56 |  |  | (452 | ) |  | 22,906 |
Operating costs | 2,151 |  |  | 857 |  |  | 11,916 |  |  | 321 |  |  | 8 |  |  | (11,820 | ) |  | 3,433 |
Merger termination fee and related costs, net | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 61 |  |  | 61 |
Depreciation and amortization | 94 |  |  | 43 |  |  | 71 |  |  | 18 |  |  | — |  |  | (49 | ) |  | 177 |
Total operating expenses | 21,205 |  |  | 3,424 |  |  | 11,987 |  |  | 2,157 |  |  | 64 |  |  | (12,260 | ) |  | 26,577 |
Income (loss) from operations | 655 |  |  | 296 |  |  | 531 |  |  | (237 | ) |  | (8 | ) |  | (7 | ) |  | 1,230 |
Interest expense | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 94 |  |  | 94 |
Income (loss) before income taxes | $ | 655 |  |  | $ | 296 |  |  | $ | 531 |  |  | $ | (237 | ) |  | $ | (8 | ) |  | $ | (101 | ) |  | $ | 1,136 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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