Impairments and Other Charges (Details) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated					13,000
Goodwill impairment		$ 0			$ 0
Venezuela trade receivables exchanged for promissory note			$ 200
Pre-tax loss on promissory note			$ 148	$ 0	148	$ 0
Fixed asset impairments				154	2,537	648
Severance costs				96	261	308
Intangible asset impairments				37	87	209
Inventory write-downs				64	130	410
Other restructuring costs				21	40	173
Country closures				4	2	81
Other Deductions and Charges				5	(16)	66
Impairments and other charges	[1]	$ 0		$ 381	$ 3,189	$ 1,895

[1] Impairments and other charges are as follows:-For the three months ended September 30, 2015, includes $228 million attributable to Completion and Production, $138 million attributable to Drilling and Evaluation, and $15 million attributable to Corporate and other. -For the nine months ended September 30, 2016, includes $2.0 billion attributable to Completion and Production, $1.1 billion attributable to Drilling and Evaluation, and $8 million attributable to Corporate and other. -For the nine months ended September 30, 2015, includes $949 million attributable to Completion and Production, $865 million attributable to Drilling and Evaluation, and $81 million attributable to Corporate and other.