CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - Unaudited - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 3,122	$ 3,347
Cost of revenue	(2,999)	(3,254)
Gross profit	123	93
G&A	(71)	(67)
Impairment	63	(47)
Foreign currency gain (loss)	(19)	(11)
Operating profit (loss)	96	(32)
Interest expense	(16)	(22)
Interest income	7	4
Earnings (loss) from Cont Ops before taxes	87	(50)
Income tax (expense) benefit	(31)	(3)
Net earnings (loss) from Cont Ops	56	(53)
Less: Net earnings (loss) from Cont Ops attributable to NCI	8	33
Net earnings (loss) from Cont Ops attributable to Fluor	48	(86)
Net earnings (loss) from Disc Ops attributable to Fluor	0	(1)
Net earnings (loss) attributable to Fluor	48	(87)
Less: Dividends on CPS	10	0
Net earnings (loss) available to Fluor common stockholders	$ 38	$ (87)
Basic EPS available to Fluor common stockholders
Earnings (loss) from Cont Ops (in dollars per share)	$ 0.27	$ (0.61)
Earnings (loss) from Disc Ops (in dollars per share)	0	(0.01)
Diluted EPS available to Fluor common stockholders
Earnings (loss) from Cont Ops (in dollars per share)	0.27	(0.61)
Earnings (loss) from Disc Ops (in dollars per share)	$ 0	$ (0.01)