CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 4,118,556	$ 4,133,612
Cost of revenue	4,057,159	4,070,859
Other (income) and expenses
Corporate general and administrative expense	(14,052)	58,621
Impairment, restructuring and other exit costs	297,604	27,368
Interest expense	18,323	18,630
Interest income	(12,052)	(12,892)
Total cost and expenses	4,346,982	4,162,586
Earnings (loss) from continuing operations before taxes	(228,426)	(28,974)
Income tax expense (benefit)	(66,831)	15,257
Net earnings (loss) from continuing operations	(161,595)	(44,231)
Net earnings (loss) from discontinued operations	(94,855)	(814)
Net earnings (loss)	(256,450)	(45,045)
Less: Net earnings (loss) attributable to NCI from continuing operations	9,509	23,859
Net earnings (loss) attributable to Fluor Corporation from continuing operations	(171,104)	(68,090)
Less: Net earnings (loss) attributable to NCI from discontinued operations	0	0
Net earnings (loss) attributable to Fluor Corporation	(265,959)	(68,904)
Amounts attributable to Fluor Corporation
Net earnings (loss) attributable to Fluor Corporation from continuing operations	(171,104)	(68,090)
Net earnings (loss) attributable to Fluor Corporation from discontinued operations	(94,855)	(814)
Net earnings (loss) attributable to Fluor Corporation	$ (265,959)	$ (68,904)
Basic earnings (loss) per share attributable to Fluor Corporation
Earnings (loss) from continuing operations (in dollars per share)	$ (1.22)	$ (0.49)
Earnings (loss) from discontinued operations, net of taxes (in dollars per share)	(0.68)	0
Net earnings (loss) (in dollars per share)	(1.90)	(0.49)
Diluted earnings (loss) per share attributable to Fluor Corporation
Earnings (loss) from continuing operations (in dollars per share)	(1.22)	(0.49)
Earnings (loss) from discontinued operations, net of taxes (in dollars per share)	(0.68)	0
Net earnings (loss) (in dollars per share)	$ (1.90)	$ (0.49)