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Goodwill and Other Intangibles (Tables) | 9 Months Ended
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Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Change in goodwill | Below is a summary of the changes in the carrying value of goodwill by segment for the nine months ended September 30, 2021:
In millions | Health Care Benefits |  | Pharmacy Services |  | Retail/ LTC |  | Total
Balance at December 31, 2020 | $ | 45,130 |  |  | $ | 23,615 |  |  | $ | 10,807 |  |  | $ | 79,552 |
Impairment | — |  |  | — |  |  | (431) |  |  | (431) |
Balance at September 30, 2021 | $ | 45,130 |  |  | $ | 23,615 |  |  | $ | 10,376 |  |  | $ | 79,121 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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