SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2018

Valuation and Qualifying Accounts [Abstract]

SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS

For the Years Ended December 31, 2018, 2017 and 2016

	(In Millions)
Column A	Column B		Column C					Column D				Column E
			Additions
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts			Deductions				Balance at End of Period
Allowances for doubtful accounts, deducted from accounts receivable in the balance sheet:
2018	$	13	$	6	$	—		$	(5	)	(a)	$	14
2017	$	11	$	5	$	—		$	(3	)	(a)	$	13
2016	$	11	$	4	$	—		$	(4	)	(a)	$	11
Valuation allowance on deferred tax assets:
2018	$	47	$	—	$	—		$	(4	)	(b)	$	43
2017	$	45	$	—	$	2	(c)	$	—			$	47
2016	$	49	$	11	$	—		$	(15	)	(d)	$	45

(a) Deductions, representing uncollectible accounts written off, less recoveries of accounts written off in prior years.

(b) $3 million net reduction to valuation allowance recorded as an income tax benefit and $1 million reduction recorded primarily in other comprehensive income (loss).

(c) $2 million adjustment to the valuation allowance was recorded primarily in other comprehensive income (loss).

(d) Write off $13 million of deferred tax assets on certain state and local net operating loss carryforwards against the valuation allowance, as it was determined that there was only a remote likelihood that such carryforwards could be utilized; and, $2 million adjustment to the valuation allowance was recorded primarily in other comprehensive income (loss).