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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018		Sep. 30, 2017
Net income	$ 581.6	$ 404.2	$ 1,496.7	[1]	$ 1,194.6	[1]
Other comprehensive income (loss)
Net unrealized holding gains on available-for-sale investments		4.9			37.1
Reclassification losses recognized in non-operating income upon dispositions, determined using average cost		(0.1)			(78.0)
Net unrealized losses recognized upon the transfer to trading investments		0.0			(23.6)
Total net unrealized holding gains (losses) recognized in other comprehensive income		4.8			(64.5)
Currency translation adjustments	(12.9)	17.6	(39.8)		58.1
Other comprehensive income (loss) before income taxes	(12.9)	22.4	(39.8)		(6.4)
Net deferred tax benefits (income taxes)	2.3	(7.1)	5.8		8.2
Total other comprehensive income (loss)	(10.6)	15.3	(34.0)		1.8
Total comprehensive income	571.0	419.5	1,462.7		1,196.4
Less: comprehensive income (loss) attributable to redeemable non-controlling interests	(4.7)	17.5	(5.7)		57.7
Comprehensive income attributable to T. Rowe Price Group	575.7	402.0	1,468.4		1,138.7
Variable interest entities [Member]
Other comprehensive income (loss)
Consolidated T. Rowe Price investment products - variable interest entities	(5.8)	16.7	(29.6)		53.7
Reclassification losses recognized in non-operating income upon deconsolidation of certain T. Rowe Price investment products	0.0	(0.1)	(3.6)		(0.1)
Currency translation adjustments	(5.8)	16.6	(33.2)		53.6
Equity method investments [Member]
Other comprehensive income (loss)
Currency translation adjustments	$ (7.1)	$ 1.0	$ (6.6)		$ 4.5
[1] See note 12 for supplementary consolidating cash flow statements.

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