Contingencies and Commitments (Details) (USD $)	3 Months Ended		0 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended			1 Months Ended
	Mar. 31, 2013 item	Dec. 31, 2012	Nov. 16, 2012 Greater Gabbard Offshore Wind Farm Project	Mar. 31, 2013 Greater Gabbard Offshore Wind Farm Project	Jul. 31, 2011 St. Joe Minerals Matters	Mar. 31, 2013 St. Joe Minerals Matters lawsuit	Mar. 31, 2012 Embassy Projects	Mar. 31, 2013 Embassy Projects	Nov. 30, 2006 Conex International v. Fluor Enterprises, Inc
Contingencies and Commitments
Contracts receivable, claims and uncertain amounts	$ 20,000,000	$ 20,000,000						$ 33,000,000
Project amount lumpsum				1,800,000,000
Project charges			416,000,000				13,000,000
Counterclaim against the company to recover costs				100,000,000
Compensatory and economic damages					38,500,000
Punitive damages					320,000,000
Number of additional lawsuits						23
Amount of damages related to a 2001 construction project									$ 99,000,000
Number of contracts	0