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MEDICARE PART D (Tables)
 12 Months Ended
Dec. 31, 2017
Insurance [Abstract]  
Balance Sheet Amounts Associated With Medicare Part D
The accompanying consolidated balance sheets include the following amounts associated with Medicare Part D as of December 31, 2017 and 2016. 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.
 
 
2017
 
2016
 
 
Risk
Corridor
Settlement
 
CMS
Subsidies/
Discounts
 
Risk
Corridor
Settlement
 
CMS
Subsidies/
Discounts
 
 
(in millions)
Other current assets
 
$
4

 
$
101

 
$
8

 
$
1,001

Trade accounts payable and accrued expenses
 
(255
)
 
(1,085
)
 
(158
)
 
(128
)
Net current (liability) asset
 
(251
)
 
(984
)
 
(150
)
 
$
873

Other long-term liabilities
 
(28
)
 
—

 
—

 
—

       Total net (liability) asset
 
$
(279
)
 
$
(984
)
 
$
(150
)
 
$
873