Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Revenue	$ 4,986	$ 4,256	$ 3,491
Costs and Expenses
Production Expense	1,197	1,141	1,100
Exploration Expense	129	188	925
Depreciation, Depletion and Amortization	1,934	2,053	2,454
Loss on Marcellus Shale Upstream Divestiture and Other	0	2,379	0
Gain on Divestitures, Net	(843)	(326)	(238)
Asset Impairments	206	70	92
Goodwill Impairment	1,281	0	0
General and Administrative	385	415	399
Other Operating Expense, Net	346	138	135
Total	4,635	6,058	4,867
Operating Income (Loss)	351	(1,802)	(1,376)
Other Expense
(Gain) Loss on Commodity Derivative Instruments	(63)	(63)	139
Loss (Gain) on Extinguishment of Facility or Debt	8	98	(80)
Interest, Net of Amount Capitalized	282	354	328
Other Non-Operating (Income) Expense, Net	(16)	0	9
Total	211	389	396
Income (Loss) Before Income Taxes	140	(2,191)	(1,772)
Income Tax Expense (Benefit)	126	(1,141)	(787)
Net Income (Loss) and Comprehensive Income (Loss) Including Noncontrolling Interests	14	(1,050)	(985)
Less: Net Income and Comprehensive Income Attributable to Noncontrolling Interests	80	68	13
Net Loss and Comprehensive Loss Attributable to Noble Energy	$ (66)	$ (1,118)	$ (998)
Loss Attributable to Noble Energy per Common Share
Basic and Diluted (in usd per share)	$ (0.14)	$ (2.38)	$ (2.32)
Weighted Average Number of Shares Outstanding
Weighted Average Number of Shares Outstanding, Basic and Diluted (in shares)	483	469	430
Oil, NGL and Gas Sales
Revenues
Revenue	$ 4,461	$ 4,060	$ 3,389
Sales of Purchased Oil and Gas and Other
Revenues
Revenue	$ 525	$ 196	$ 102