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Goodwill and Other Intangibles (Tables)
9 Months Ended
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 millionsHealth 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