SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2016

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

(in millions)

	Balance at Beginning of Period		Charged (Credited) to Costs and Expenses			Charged to Other Accounts		Deductions(a)			Balance at End of Period
2016
Deferred tax valuation allowance	$	382	$	398		$	—	$	—		$	780
Other asset valuation allowance	$	68	$	(12	)	$	—	$	—		$	56
Environmental reserves	$	7	$	—		$	—	$	(1	)	$	6
2015
Deferred tax valuation allowance(b)	$	—	$	294		$	88	$	—		$	382
Other asset valuation allowance	$	10	$	58		$	—	$	—		$	68
Environmental reserves	$	8	$	—		$	—	$	(1	)	$	7
2014
Other asset valuation allowance	$	—	$	10		$	—	$	—		$	10
Environmental reserves	$	8	$	1		$	—	$	(1	)	$	8

(a) Consists of payments.

(b) Our 2015 deferred tax liabilities were net of $88 million, which represented the federal benefit for the state-related portion of the deferred tax valuation allowance.