Other Expense (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Income and Expenses [Abstract]
Restructuring Charges		$ 159	$ 0	$ 0
Transportation commitment charges		74	161	167
Relocation Costs		41	0	0
Asset Impairment Charges		38	11	2
Asset divestiture-related charges		25	170	0
Idle drilling and well service equipment charges		25	0	0
Accelerated depreciation		23	443	0
Legal and environmental charges		19	21	20
Loss (income) from vertical integration services		15	2	17
Other		29	41	38
Total other expense		448	849	244
Accelerated amortization	$ 28	28
Exit and Relocation Costs		13
Gross vertical integration revenues		51	128	140
Total vertical integration costs and expenses		$ 66	$ 130	$ 157