Charges and Credits - Additional Information (Detail) - USD ($)	3 Months Ended			12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2017
Charges And Credits [Line Items]
Charges and credits, Pretax	$ 0
Charge relating to one-time mandatory tax on previously deferred foreign earnings		$ 410,000,000		$ 410,000,000
Tax credits resulting from remeasurement of net deferred tax liabilities		334,000,000
US tax reform
Charges And Credits [Line Items]
Charges and credits, Net		$ 76,000,000
US tax reform | Tax Year2018
Charges And Credits [Line Items]
Reduced corporate income tax rate				21.00%
Merger and Integration | Cameron International Corporation | Merger-related employee benefits
Charges And Credits [Line Items]
Charges and credits, Pretax			$ 82,000,000