Contingencies and Commitments (Tables)

6 Months Ended

Jun. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Gathering, Processing and Transportation Commitments

The aggregate undiscounted commitments under our gathering, processing and transportation agreements, excluding any reimbursement from working interest and royalty interest owners, credits for third-party volumes or future costs under cost-of-service agreements, are presented below.

	June 30, 2017
	($ in millions)
2017	$	664
2018	1,096
2019	1,061
2020	990
2021	894
2022 – 2035	5,213
Total	$	9,918