Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2017

Schedule II — Valuation and Qualifying Accounts



	Year ended December 31
Millions of Dollars	2017			2016			2015
Employee Termination Benefits
Balance at January 1	$	111		$	308		$	49
Additions (reductions) charged to expense	20			160			342
Payments	(69		)	(357		)	(83		)
Balance at December 31	$	62		$	111		$	308
Allowance for Doubtful Accounts
Balance at January 1	$	487		$	429		$	194
Additions to expense	128			76			251
Bad debt write-offs	(9		)	(18		)	(16		)
Balance at December 31	$	606		$	487		$	429
Deferred Income Tax Valuation Allowance^*
Balance at January 1	$	16,069		$	15,412		$	16,292
Additions to deferred income tax expense	2,681			1,810			1,440
Reduction of deferred income tax expense	(2,176		)	(1,153		)	(2,320		)
Balance at December 31	$	16,574		$	16,069		$	15,412

* See also Note 18 to the Consolidated Financial Statements, beginning on page 75.