Fixed Assets - Depreciation Expense Relating to Fixed Assets -Additional Information (Detail) (USD $) In Billions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property Plant And Equipment [Line Items]
Depreciation expense relating to fixed assets	$ 3.1	$ 2.9	$ 2.7
Buildings & improvements | Minimum
Property Plant And Equipment [Line Items]
Useful Life	25 years
Buildings & improvements | Maximum
Property Plant And Equipment [Line Items]
Useful Life	30 years
Machinery & equipment | Minimum
Property Plant And Equipment [Line Items]
Useful Life	5 years
Machinery & equipment | Maximum
Property Plant And Equipment [Line Items]
Useful Life	10 years
Seismic vessels | Minimum
Property Plant And Equipment [Line Items]
Useful Life	20 years
Seismic vessels | Maximum
Property Plant And Equipment [Line Items]
Useful Life	30 years