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Goodwill (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Goodwill. |
Goodwill by Segment |
|  | Pharmacy |  |  |  |  |  |
In millions |  | Services |  | Retail/LTC |  | Total
Balance, December 31, 2017 |  | $ | 21,819 |  | $ | 16,632 |  | $ | 38,451
Acquisitions |  |  | 26 |  |  | 36 |  |  | 62
Divestiture of RxCrossroads subsidiary |  |  | — |  |  | (398) |  |  | (398)
Balance, March 31, 2018 |  | $ | 21,845 |  | $ | 16,270 |  | $ | 38,115

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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