SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2020

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

SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS

For the Years Ended December 31, 2020, 2019, and 2018

(in millions)

					Additions
	Balance  at Beginning of Period		Acquired/(Disposed) Balances		Charged (Credited)  to Costs and Expenses		Charged  to Other Accounts (1)		Deductions or Write-offs		Balance at End  of Period
Allowance for loss on receivables:
2020	$	69	$	—	$	36	$	(1)	$	(32)	$	72
2019	79		—		(1)		—		(9)		69
2018	96		—		36		(29)		(24)		79
Deferred tax asset valuation allowance:
2020	(45)		—		8		—		—		(37)
2019	(54)		—		9		—		—		(45)
2018	(49)		—		(5)		—		—		(54)

(1)Represents changes in retroactive membership adjustments to premiums revenue and contractual allowances adjustments to services revenue as more fully described in Note 2 to the consolidated financial statements included in this annual report on Form 10-K.