Charges and Credits - Summary of Charges (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Investment In Joint Venture [Line Items]
Charges, Pretax	$ 152	$ (420)	$ 161	$ 223
Charges, Tax		49	22	28
Charges, Net	122	(469)	139	195
Provision for Accounts Receivable
Investment In Joint Venture [Line Items]
Charges, Pretax		152
Charges, Tax		30
Charges, Net		122
Gain on formation of OneSubsea joint venture | Gain on formation of OneSubsea
Investment In Joint Venture [Line Items]
Charges, Pretax		(1,028)
Charges, Tax
Charges, Net		(1,028)
Impairment of equity-method investments | Impairment And Other
Investment In Joint Venture [Line Items]
Charges, Pretax		364
Charges, Tax		19
Charges, Net		345
Currency devaluation loss in Venezuela | Impairment And Other
Investment In Joint Venture [Line Items]
Charges, Pretax		92
Charges, Tax
Charges, Net		92
Merger-related integration costs | Merger & integration
Investment In Joint Venture [Line Items]
Charges, Pretax			128	113
Charges, Tax			16	18
Charges, Net			112	95
Workforce reduction | Restructuring & other
Investment In Joint Venture [Line Items]
Charges, Pretax			33
Charges, Tax			6
Charges, Net			27
General & administrative | Donation to the Schlumberger Foundation
Investment In Joint Venture [Line Items]
Charges, Pretax				50
Charges, Tax				10
Charges, Net				40
Cost of revenue | Write-off of Assets in Libya
Investment In Joint Venture [Line Items]
Charges, Pretax				60
Charges, Tax
Charges, Net				$ 60