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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Condensed Consolidated Statements of Comprehensive Income
Net income	$ 105.5	$ 113.6	$ 242.7	$ 271.0
Other comprehensive income (loss), net of income tax:
Foreign currency translation adjustments	6.0	(3.5)	10.8	(41.0)
Unrealized holding losses on financial investments		(0.3)		(0.3)
Post-retirement benefit obligations		1.1		1.1
Comprehensive income	111.5	110.9	253.5	230.8
Comprehensive income allocated to participating securities	(0.3)	(0.3)	(0.7)	(0.7)
Comprehensive income allocated to common stockholders, net of income tax	$ 111.2	$ 110.6	$ 252.8	$ 230.1

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