Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues
Revenue from Sales	$ 1,119	$ 1,273	$ 3,264	$ 3,789
Total	1,119	1,273	3,264	3,789
Costs and Expenses
Production Expense	297	273	862	886
Depreciation, Depletion and Amortization	583	485	1,619	1,418
General and Administrative	91	107	298	316
Other Operating Expense, Net	61	27	257	107
Gain on Divestitures, Net	0	(193)	0	(859)
Asset Impairments	0	0	0	168
Total	1,128	775	3,332	2,240
Operating (Loss) Income	(9)	498	(68)	1,549
Other (Income) Expense
(Gain) Loss on Commodity Derivative Instruments	(129)	155	23	483
Interest, Net of Amount Capitalized	67	70	196	216
Other Non-Operating Expense (Income), Net	2	(34)	7	(10)
Total	(60)	191	226	689
Income (Loss) Before Income Taxes	51	307	(294)	860
Income Tax Expense (Benefit)	15	59	(49)	44
Net Income (Loss) and Comprehensive Income (Loss) Including Noncontrolling Interests	36	248	(245)	816
Less: Net Income and Comprehensive Income Attributable to Noncontrolling Interests	19	21	61	58
Net Income (Loss) and Comprehensive Income (Loss) Attributable to Noble Energy	$ 17	$ 227	$ (306)	$ 758
Net Income (Loss) Attributable to Noble Energy Common Shareholders per Share
Basic ($ per share)	$ 0.04	$ 0.47	$ (0.64)	$ 1.57
Diluted ($ per share)	$ 0.04	$ 0.47	$ (0.64)	$ 1.56
Weighted Average Number of Common Shares Outstanding
Basic (in shares)	478	482	478	484
Diluted (in shares)	480	484	478	486
Oil, NGL and Gas Sales
Revenues
Revenue from Sales	$ 1,003	$ 1,136	$ 2,894	$ 3,409
Sales of Purchased Oil and Gas
Revenues
Revenue from Sales	87	72	264	191
Costs and Expenses
Cost of Purchased Oil and Gas	96	76	296	204
Other Revenue
Revenues
Revenue from Sales	$ 29	$ 65	$ 106	$ 189