CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ (729,539)	$ 96,025	$ (1,366,333)	$ 215,128
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Foreign currency translation adjustment	(42,002)	(11,733)	(14,337)	(44,356)
Ownership share of equity method investees’ other comprehensive income (loss)	2,662	(6,495)	(2,125)	6,055
Defined benefit pension and postretirement plan adjustments	1,990	(39,803)	6,093	(35,933)
Unrealized loss on derivative contracts	(6,294)	(1,952)	(599)	(7,694)
Unrealized gain on available-for-sale securities	0	0	0	709
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	(43,644)	(59,983)	(10,968)	(81,219)
COMPREHENSIVE INCOME (LOSS)	(773,183)	36,042	(1,377,301)	133,909
LESS: COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS	10,696	18,280	(12,658)	39,258
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO FLUOR CORPORATION	$ (783,879)	$ 17,762	$ (1,364,643)	$ 94,651