Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Minimum commitments

Minimum commitments as of December 31, 2015 consist of the following:

(millions)	Drilling, Equipment, and Purchase Obligations		Transportation and Gathering Obligations		Operating Lease  Obligations		Capital  Lease and Other Obligations(1)		Total
2016	$	291	$	217	$	42	$	76	$	626
2017	167		248		44		81		540
2018	22		314		39		79		454
2019	16		305		26		50		397
2020	10		270		26		47		353
2021 and Thereafter	9		1,816		168		179		2,172
Total	$	515	$	3,170	$	345	$	512	$	4,542

⁽¹⁾ Annual lease payments, net to our interest, exclude regular maintenance and operational costs. See Note 10. Long-Term Debt.