CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Net income including noncontrolling interest	$ 395.8	$ 379.5	$ 950.7	$ 875.1
Foreign currency translation adjustments
Foreign currency translation	150.6	17.2	275.8	(1.3)
Loss on net investment hedges	(50.9)	(1.2)	(103.7)	(29.1)
Total foreign currency translation adjustments	99.7	16.0	172.1	(30.4)
Derivatives and hedging instruments	(20.8)	(9.5)	(29.1)	(40.2)
Pension and postretirement benefits
Amortization of net actuarial loss and prior service cost included in net periodic pension and postretirement costs	1.3	5.6	8.2	16.7
Postretirement benefit changes		30.9		30.9
Total pension and postretirement benefits	1.3	36.5	8.2	47.6
Subtotal	80.2	43.0	151.2	(23.0)
Total comprehensive income, including noncontrolling interest	476.0	422.5	1,101.9	852.1
Comprehensive income attributable to noncontrolling interest	4.0	8.0	10.8	17.8
Comprehensive income attributable to Ecolab	$ 472.0	$ 414.5	$ 1,091.1	$ 834.3