Segment Information - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 Segment	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting [Abstract]
Number of reporting segments	3
Segment Reporting Information [Line Items]
Revenues	$ 18,470,000,000	$ 14,581,000,000	$ 13,411,000,000
Major Customer [Member]
Segment Reporting Information [Line Items]
Revenues	0
Midstream Reporting Segment [Member]
Segment Reporting Information [Line Items]
Number of operating segments	2
Oil and Gas Exploration and Production Reporting Segment [Member] | Total S.A. [Member]
Segment Reporting Information [Line Items]
Revenues		$ 2,000,000,000	$ 1,900,000,000