Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Income Including Noncontrolling Interest	$ 25.7	$ 5.2
Other Comprehensive (Loss) Income:
Foreign Currency Translation Adjustments (net of related tax benefit of $0.1 million and $0 million, respectively)	(10.7)	(11.3)
Cash Flow Hedge (net of related tax expense of $0 million and $1.1 million, respectively)	0.0	3.7
Total Other Comprehensive Income (Loss), Net Of Tax	(10.7)	(7.6)
Total Comprehensive Income (Loss) Including Noncontrolling Interest	15.0	(2.4)
Comprehensive Income (Loss) Attributable to Tennant Company	$ 15.0	$ (2.4)