Sales and Other Operating Revenue (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

	Millions of Dollars
	Three Months Ended
	March 31
	2018		2017	*
Revenue from contracts with customers	$	6,545	5,158
Revenue from contracts outside the scope of ASC Topic 606
Physical contracts meeting the definition of a derivative		2,261	2,425
Financial derivative contracts		(8)	(65)
Consolidated sales and other operating revenues	$	8,798	7,518
*Under the modified retrospective approach, prior period amounts have not been adjusted upon adoption of ASC Topic 606.

	Millions of Dollars
	Three Months Ended
	March 31
	2018		2017	*
Revenue from Contracts Outside the Scope of ASC Topic 606 by Segment
Lower 48	$	1,713	1,727
Canada		191	279
Europe and North Africa		357	419
Physical contracts meeting the definition of a derivative	$	2,261	2,425
*Under the modified retrospective approach, prior period amounts have not been adjusted upon adoption of ASC Topic 606.

	Millions of Dollars
	Three Months Ended
	March 31
	2018		2017	*
Revenue from Contracts Outside the Scope of ASC Topic 606 by Product
Crude oil	$	286	141
Natural gas		1,890	2,194
Other		85	90
Physical contracts meeting the definition of a derivative	$	2,261	2,425
*Under the modified retrospective approach, prior period amounts have not been adjusted upon adoption of ASC Topic 606.

Contract with Customer, Asset and Liability [Table Text Block]

	Millions of Dollars
Contract Liabilities
At January 1, 2018	$	251
At March 31, 2018	$	251
Amounts Recognized in the Consolidated Balance Sheet at March 31, 2018
Current liabilities	$	153
Noncurrent liabilities		98
	$	251