CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - UNAUDITED - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenue	$ 3,612	$ 3,503	$ 10,034	$ 10,534
Cost of revenue	(3,627)	(3,390)	(9,812)	(10,240)
Gross profit	(15)	113	222	294
G&A	(30)	(44)	(146)	(144)
Impairment	0	(5)	63	(153)
Foreign currency gain (loss)	34	37	51	(4)
Operating profit (loss)	(11)	101	190	(7)
Interest expense	(14)	(37)	(43)	(76)
Interest income	28	4	47	13
Earnings (loss) from Cont Ops before taxes	3	68	194	(70)
Income tax (expense) benefit	(27)	(29)	(89)	(35)
Net earnings (loss) from Cont Ops	(24)	39	105	(105)
Less: Net earnings (loss) from Cont Ops attributable to NCI	(46)	(3)	(31)	22
Net earnings (loss) from Cont Ops attributable to Fluor	22	42	136	(127)
Net earnings (loss) from Disc Ops attributable to Fluor	0	(1)	0	(34)
Net earnings (loss) attributable to Fluor	22	41	136	(161)
Less: Dividends on CPS	10	10	29	15
Net earnings (loss) available to Fluor common stockholders	$ 12	$ 31	$ 107	$ (176)
Basic EPS available to Fluor common stockholders
Net earnings (loss) from Cont Ops (in dollars per share)	$ 0.08	$ 0.23	$ 0.75	$ (1.00)
Net earnings (loss) from Disc Ops (in dollars per share)	0	(0.01)	0	(0.24)
Diluted EPS available to Fluor common stockholders
Net earnings (loss) from Cont Ops (in dollars per share)	0.08	0.22	0.74	(1.00)
Net earnings (loss) from Disc Ops (in dollars per share)	$ 0	$ (0.01)	$ 0	$ (0.24)