Contingencies and Commitments (Tables)

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of contractual obligation

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:

	September 30, 2018
	($ in millions)
2018	$	269
2019	1,048
2020	992
2021	900
2022	792
2023 – 2035	4,443
Total	$	8,444