CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Net income including noncontrolling interest	$ 248.2	$ 257.3
Foreign currency translation adjustments
Foreign currency translation	115.6	81.0
Gain (loss) on net investment hedges	(26.2)	2.8
Total foreign currency translation adjustments	89.4	83.8
Derivatives and hedging instruments	(2.1)	(9.2)
Pension and postretirement benefits
Amortization of net actuarial loss and prior service cost included in net periodic pension and postretirement costs	0.3	3.3
Total pension and postretirement benefits	0.3	3.3
Subtotal	87.6	77.9
Total comprehensive income, including noncontrolling interest	335.8	335.2
Comprehensive income attributable to noncontrolling interest	3.4	4.5
Comprehensive income attributable to Ecolab	$ 332.4	$ 330.7