Contingencies and Commitments (Tables)

6 Months Ended

Jun. 30, 2016

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, 2016
	($ in millions)
2016	$	925
2017	1,874
2018	1,670
2019	1,374
2020	1,046
2021 – 2099	6,572
Total	$	13,461