Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Minimum commitments

Minimum commitments as of December 31, 2014 consist of the following:

(millions)	Drilling, Equipment, and Purchase Obligations		Transportation and Gathering Obligations		Operating Lease  Obligations		Capital  Lease and Other Obligations(1)		Total
2015	$	316	$	159	$	49	$	89	$	613
2016	137		185		40		78		440
2017	56		240		40		82		418
2018	11		277		31		86		405
2019	3		265		18		51		337
2020 and Thereafter	13		1,860		174		224		2,271
Total	$	536	$	2,986	$	352	$	610	$	4,484

⁽¹⁾  Annual lease payments, net to our interest, exclude regular maintenance and operational costs. See Note 9. Long-Term Debt.