Schedule II - Valuation and Qualifying Accounts and Reserves (Tables)

12 Months Ended

Dec. 31, 2020

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts Reserves

(in millions)	Balance at beginning of year		Charged (Credited) to costs and expenses		Charged (Credited) to other accounts		Other deductions		Balance at end of year
Description
2020
Investment asset valuation reserves
Available-for-sale debt securities	$	—	$	82	$	—	$	(56)	$	26
Accounts receivable, net	$	252	$	(50)	$	(12)	$	(34)	$	156
Deferred tax asset valuation allowance	$	196	$	10	$	1	$	—	$	207
Reinsurance recoverables (1)	$	2	$	(1)	$	31	$	—	$	32
2019
Accounts receivable, net	$	217	$	51	$	—	$	(16)	$	252
Deferred tax asset valuation allowance	$	199	$	(6)	$	3	$	—	$	196
Reinsurance recoverables	$	2	$	—	$	—	$	—	$	2
2018
Accounts receivable, net	$	207	$	18	$	(3)	$	(5)	$	217
Deferred tax asset valuation allowance (2)	$	72	$	(5)	$	132	$	—	$	199
Reinsurance recoverables	$	3	$	(1)	$	—	$	—	$	2

(1)The Company recorded an additional allowance of $31 million on January 1, 2020 upon the adoption of ASU 2016-13

(2)Deferred tax valuation allowance amount includes amount assumed from Express Scripts in 2018.