Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 1,622.0	$ 1,377.2	$ 1,452.3	$ 1,350.8	$ 1,413.6	$ 1,194.0	$ 1,242.0	$ 1,195.6	$ 5,802.3	$ 5,045.2	$ 4,642.1
Gross margin	685.6	477.5	591.0	572.7	608.1	511.5	530.6	511.1	2,326.8	2,161.3	2,046.7
Income (loss) from continuing operations before equity in (earnings) loss of affiliates, non-operating pension and postretirement charges (income), interest expense, net and income taxes	394.5	210.6	235.9	303.3	272.0	215.7	287.4	259.4	1,144.3	1,034.5	896.9
Income (loss) from continuing operations	335.4	134.5	142.0	226.8	220.6	171.9	219.6	193.2	838.7	805.3	579.8
Restructuring and other charges (income)	(55.0)	(16.2)	(10.8)	(15.2)	(35.8)	(9.7)	(14.6)	(8.1)	(97.2)	(68.2)	(28.3)
Net income (loss)	280.4	118.3	131.2	211.6	184.8	162.2	205.0	185.1	741.5	737.1	551.5
Less: Net income (loss) attributable to noncontrolling interests	6.5	(2.7)	(3.0)	4.2	(5.9)	2.5	0.3	0.6	5.0	(2.5)	(0.9)
Net income (loss) attributable to FMC stockholders	273.9	121.0	134.2	207.4	190.7	159.7	204.7	184.5	736.5	739.6	552.4
Net income (loss) attributable to FMC stockholders	273.9	121.0	134.2	207.4	190.7	159.7	204.7	184.5	736.5	739.6	552.4
Earnings (loss) attributable to FMC stockholders:
Continuing operations, net of income taxes	328.9	137.2	145.0	222.6	226.5	169.4	219.3	192.6	833.7	807.8	580.7
Discontinued operations, net of income taxes	$ (55.0)	$ (16.2)	$ (10.8)	$ (15.2)	$ (35.8)	$ (9.7)	$ (14.6)	$ (8.1)	$ (97.2)	$ (68.2)	$ (28.3)
Basic earnings (loss) per common share attributable to FMC stockholders:
Continuing operations (in dollars per share)	$ 2.61	$ 1.09	$ 1.15	$ 1.77	$ 1.79	$ 1.32	$ 1.70	$ 1.48	$ 6.60	$ 6.29	$ 4.48
Discontinued operations (in dollars per share)	(0.44)	(0.13)	(0.09)	(0.12)	(0.28)	(0.08)	(0.11)	(0.06)	(0.77)	(0.53)	(0.22)
Net income (loss) attributable to FMC stockholders (in dollars per share)	2.17	0.96	1.06	1.65	1.51	1.24	1.59	1.42	5.83	5.76	4.26
Diluted earnings (loss) per common share attributable to FMC stockholders:
Continuing operations (in dollars per share)	2.61	1.08	1.15	1.76	1.78	1.32	1.69	1.48	6.58	6.26	4.45
Discontinued operations (in dollars per share)	(0.44)	(0.13)	(0.09)	(0.12)	(0.28)	(0.08)	(0.11)	(0.06)	(0.77)	(0.53)	(0.22)
Net income (loss) attributable to FMC stockholders (in dollars per share)	$ 2.17	$ 0.95	$ 1.06	$ 1.64	$ 1.50	$ 1.24	$ 1.58	$ 1.42	$ 5.81	$ 5.73	$ 4.23
Shares (in thousands):
Basic (in shares)	125,600	126,200	126,200	126,100	126,600	128,300	129,100	129,500	125,975	128,403	129,701
Diluted (in shares)	126,400	126,900	126,900	126,800	127,400	129,000	129,900	130,300	126,707	129,146	130,584