Contingencies and Commitments (Details) (USD $)			6 Months Ended		1 Months Ended	6 Months Ended	3 Months Ended		1 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Greater Gabbard Offshore Wind Farm Project	Jun. 30, 2013 Greater Gabbard Offshore Wind Farm Project Maximum	Jul. 31, 2011 St. Joe Minerals Matters	Jun. 30, 2013 St. Joe Minerals Matters lawsuit	Jun. 30, 2013 Embassy Projects	Mar. 31, 2012 Embassy Projects	Nov. 30, 2006 Conex International v. Fluor Enterprises, Inc	Dec. 31, 2001 Conex International v. Fluor Enterprises, Inc item
Contingencies and Commitments
Contracts receivable, claims and uncertain amounts	$ 0	$ 20,000,000
Project amount lump-sum			1,800,000,000
Project charges							17,000,000	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						21
Amount of damages related to a 2001 construction project									$ 99,000,000
Number of contracts										0