Charges and Credits - Summary of Charges (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Investment In Joint Venture [Line Items]
Charges, Pretax		$ (572)
Charges, Tax		19
Charges, Net	0	(591)
Gain on formation of OneSubsea joint venture | Gain on formation of OneSubsea
Investment In Joint Venture [Line Items]
Charges, Pretax		(1,028)
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, Net		$ 92