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MEDICARE PART D
 3 Months Ended
Mar. 31, 2022
Insurance [Abstract]  
MEDICARE PART D MEDICARE PART D
We cover prescription drug benefits in accordance with Medicare Part D under multiple contracts with the Centers for Medicare and Medicaid Services, or CMS, as described further in Note 2 to the consolidated financial statements included in our 2021 Form 10-K. The accompanying condensed consolidated balance sheets include the following amounts associated with Medicare Part D at March 31, 2022 and December 31, 2021. CMS subsidies/discounts in the table below include the reinsurance and low-income cost subsidies funded by CMS for which we assume no risk as well as brand name prescription drug discounts for Part D plan participants in the coverage gap funded by CMS and pharmaceutical manufacturers.
 March 31, 2022December 31, 2021
Risk
Corridor
Settlement		CMS
Subsidies/
Discounts		Risk
Corridor
Settlement		CMS
Subsidies/
Discounts
 (in millions)
Other current assets$139 $997 $363 $1,894 
Trade accounts payable and accrued expenses(52)(2,046)(68)(466)
Net current asset (liability)87 (1,049)295 1,428 
Other long-term assets310 — 5 — 
Other long-term liabilities(221)— (194)— 
Net long-term asset (liability)89 — (189)— 
Total net asset (liability)$176 $(1,049)$106 $1,428