Goodwill and Intangible Assets - Schedule Of Changes In Goodwill By Operating Segment (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2019 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Goodwill [Roll Forward] | |||
| Balance beginning of period | $ 7,015 | $ 4,749 | |
| Acquisitions and purchase accounting adjustments | 108 | 2,266 | |
| Impairment | $ (259) | (259) | |
| Translation impact | (1) | ||
| Balance end of period | 6,863 | 7,015 | |
| Managed Care | |||
| Goodwill [Roll Forward] | |||
| Balance beginning of period | 5,686 | 4,015 | |
| Acquisitions and purchase accounting adjustments | 61 | 1,671 | |
| Impairment | (16) | ||
| Translation impact | (1) | ||
| Balance end of period | 5,730 | 5,686 | |
| Specialty Services | |||
| Goodwill [Roll Forward] | |||
| Balance beginning of period | 1,329 | 734 | |
| Acquisitions and purchase accounting adjustments | 47 | 595 | |
| Impairment | (243) | ||
| Translation impact | 0 | ||
| Balance end of period | $ 1,133 | $ 1,329 | |
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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