Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues
Revenue from Sales	$ 1,093	$ 1,230	$ 2,145	$ 2,516
Total	1,093	1,230	2,145	2,516
Costs and Expenses
Production Expense	260	290	565	609
Depreciation, Depletion and Amortization	528	465	1,036	933
General and Administrative	105	105	207	209
Other Operating Expense, Net	55	34	104	84
Gain on Divestitures, Net	0	(78)	0	(666)
Asset Impairments	0	0	0	168
Firm Transportation Exit Cost	0	0	92	0
Total	1,061	887	2,204	1,465
Operating Income (Loss)	32	343	(59)	1,051
Other Expense
(Gain) Loss on Commodity Derivative Instruments	(60)	249	152	328
Interest, Net of Amount Capitalized	63	73	129	146
Other Non-Operating Expense, Net	1	11	5	24
Total	4	333	286	498
Income (Loss) Before Income Taxes	28	10	(345)	553
Income Tax Expense (Benefit)	20	16	(64)	(15)
Net Income (Loss) and Comprehensive Income (Loss) Including Noncontrolling Interests	8	(6)	(281)	568
Less: Net Income and Comprehensive Income Attributable to Noncontrolling Interests	18	17	42	37
Net (Loss) Income and Comprehensive (Loss) Income Attributable to Noble Energy	$ (10)	$ (23)	$ (323)	$ 531
Net (Loss) Income Attributable to Noble Energy Common Shareholders per Share
Basic ($ per share)	$ (0.02)	$ (0.05)	$ (0.68)	$ 1.09
Diluted ($ per share)	$ (0.02)	$ (0.05)	$ (0.68)	$ 1.09
Weighted Average Number of Common Shares Outstanding
Basic (in shares)	478	484	478	485
Diluted (in shares)	478	484	478	487
Oil, NGL and Gas Sales
Revenues
Revenue from Sales	$ 954	$ 1,100	$ 1,891	$ 2,273
Sales of Purchased Oil and Gas
Revenues
Revenue from Sales	103	66	177	119
Costs and Expenses
Cost of Purchased Oil and Gas	113	71	200	128
Other Revenue
Revenues
Revenue from Sales	$ 36	$ 64	$ 77	$ 124