Restructuring and Other Charges (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]
Tangible Asset Impairment Charges	$ 303,000,000
Inventory Write-down	309,000,000
Restructuring Charges	1,208,000,000	[1]	0	[1]
Goodwill, Impairment Loss	0
Impairment of Intangible Assets (Excluding Goodwill)	165,000,000
Severance Costs	134,000,000
Other Restructuring Costs	150,000,000
Business Exit Costs	75,000,000
Other Deductions and Charges	72,000,000
Deductions (Charges)	1,407,000,000
Completion And Production [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	510,000,000
Drilling And Evaluation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	638,000,000
VENEZUELA
Restructuring Cost and Reserve [Line Items]
Foreign Currency Transaction Gain (Loss), Realized	$ 199,000,000
Historical Exchange Rate_Venezuela	6.3
Foreign Currency Exchange Rate, Remeasurement	192

[1] (a) Includes $510 million attributable to Completion and Production, $638 million attributable to Drilling and Evaluation, and $60 million attributable to Corporate and other during the three months ended March 31, 2015.