SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Tables)

12 Months Ended

Dec. 31, 2016

SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS [Abstract]

Summary of Valuation Allowance

			Additions
	Balance Beginning of Year		Charged to Costs and Expense		Charged to Other Accounts		Deductions		Balance at End of Period
	(In millions)
2016 – Reserves for doubtful accounts	$	7	$	3	$	—	$	1	$	9
2015 – Reserves for doubtful accounts	$	6	$	1	$	—	$	—	$	7
2014 – Reserves for doubtful accounts	$	4	$	4	$	—	$	2	$	6