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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Consolidated Statements of Comprehensive Income
Net income	$ 761.4	$ 235.0	$ 529.0
Other comprehensive income (loss), net of income tax:
Foreign currency translation adjustments	24.6	(85.6)	(19.3)
Unrealized holding losses on financial investments	(2.8)	(0.8)
Post-retirement benefit obligations	(0.2)	(0.2)	(0.1)
Comprehensive income	783.0	148.4	509.6
Comprehensive income allocated to participating securities	(3.9)	(0.9)	(1.7)
Comprehensive income allocated to common stockholders, net of income tax	$ 779.1	$ 147.5	$ 507.9

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