Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2016

Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts

Schedule II — Valuation and Qualifying Accounts

	Year ended December 31
Millions of Dollars	2016			2015			2014
Employee Termination Benefits
Balance at January 1	$	308		$	49		$	14
Additions (reductions) charged to expense	160			342			53
Payments	(357		)	(83		)	(18		)
Balance at December 31	$	111		$	308		$	49
Allowance for Doubtful Accounts
Balance at January 1	$	429		$	194		$	95
Additions to expense	76			251			119
Bad debt write-offs	(18		)	(16		)	(20		)
Balance at December 31	$	487		$	429		$	194
Deferred Income Tax Valuation Allowance*
Balance at January 1	$	15,412		$	16,292		$	17,171
Additions to deferred income tax expense	1,810			1,440			1,192
Reduction of deferred income tax expense	(1,153		)	(2,320		)	(2,071		)
Balance at December 31	$	16,069		$	15,412		$	16,292

 * See also Note 19 to the Consolidated Financial Statements, beginning on page FS-49.