Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 206.2	$ 217.2
Foreign currency adjustments:
Foreign currency translation gain (loss) arising during the period		(35.4)	(2.4)
Total foreign currency translation adjustments	[1]	(35.4)	(2.4)
Derivative instruments:
Unrealized hedging gains (losses) and other, net of tax of $12.0 and zero for the three months ended March 31, 2020 and 2019, respectively		27.5	0.9
Reclassification of deferred hedging (gains) losses and other, included in net income, net of tax of $(2.8) and $(1.0) for the three months ended March 31, 2020 and 2019, respectively (2)	[2]	(10.3)	(3.6)
Total derivative instruments, net of tax of $9.2 and $(1.0) for the three months ended March 31, 2020 and 2019, respectively		17.2	(2.7)
Pension and other postretirement benefits:
Reclassification of net actuarial and other (gain) loss and amortization of prior service costs, included in net income, net of tax of 0.4 and $0.9 for the three months ended March 31, 2020 and 2019, respectively	[2]	1.6	3.4
Total pension and other postretirement benefits, net of tax of $0.5 and $0.9 for the three months ended March 31, 2020 and 2019, respectively	[3]	1.6	3.4
Other comprehensive income (loss), net of tax		(16.6)	(1.7)
Comprehensive income (loss)		189.6	215.5
Less: Comprehensive income (loss) attributable to the noncontrolling interest		(1.8)	1.2
Comprehensive income (loss) attributable to FMC stockholders		$ 191.4	$ 214.3

[1] Income taxes are not provided for outside basis differences inherent in our investments in subsidiaries because the investments and related unremitted earnings are essentially permanent in duration or we have concluded that no additional tax liability will arise upon disposal or remittance.

[2] For more detail on the components of these reclassifications and the affected line item in the condensed consolidated statements of income (loss) see Note 15.

[3] See condensed consolidated statements of comprehensive income (loss).