Impairments and Other Charges (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Restructuring Cost and Reserve [Line Items]
Long-lived asset impairments		$ 108		$ 150	$ 0
Severance costs		58		77	0
Inventory write-downs		33		33	0
Venezuela investment write-down				308	265
Other		48		48	0
Impairments and other charges	[1]	247	$ 0	308	265
VENEZUELA
Restructuring Cost and Reserve [Line Items]
Venezuela investment write-down		$ 0		$ 0	$ 265

[1] For the three months ended June 30, 2019, amount includes $77 million attributable to Completion and Production, $142 million attributable to Drilling and Evaluation, and $28 million attributable to Corporate and other. For the six months ended June 30, 2019, amount includes $127 million attributable to Completion and Production, $153 million attributable to Drilling and Evaluation, and $28 million attributable to Corporate and other. During the six months ended June 30, 2018, we recognized a pre-tax charge of $265 million related to a write-down of all of our remaining investment in Venezuela. See Note 2 for further discussion on these impairments and other charges. There were no such impairments and other charges recorded during the three months ended June 30, 2018.