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

12 Months Ended

Dec. 31, 2019

Valuation and Qualifying Accounts and Reserves [Abstract]

Schedule Of Valuation And Qualifying Accounts Disclosure [Table Text Block]

			Charged		Charged
	Balance at		(Credited) to		(Credited)				Balance at
(in millions)	beginning		costs and		to other		Other		end
Description	of year		expenses		accounts		deductions		of year
2019
Allowance for doubtful accounts
Accounts receivable, net	$	217	$	51	$	-	$	(16)	$	252
Deferred tax asset valuation allowance	$	199	$	(6)	$	3	$	-	$	196
Reinsurance recoverables	$	2	$	-	$	-	$	-	$	2
2018
Allowance for doubtful accounts
Accounts receivable, net	$	207	$	18	$	(3)	$	(5)	$	217
Deferred tax asset valuation allowance (1)	$	72	$	(5)	$	132	$	-	$	199
Reinsurance recoverables	$	3	$	(1)	$	-	$	-	$	2
2017
Investment asset valuation reserves
Commercial mortgage loans	$	5	$	1	$	-	$	(6)	$	-
Allowance for doubtful accounts
Accounts receivable, net	$	200	$	19	$	(11)	$	(1)	$	207
Deferred tax asset valuation allowance	$	87	$	11	$	(26)	$	-	$	72
Reinsurance recoverables	$	3	$	-	$	-	$	-	$	3
(1) Deferred tax valuation allowance amount includes amount assumed from Express Scripts in 2018.