CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues:
Investment management fees	$ 913.7	$ 849.1	$ 813.0
Performance fees	(9.8)	(48.0)	(82.2)
Shareowner servicing fees and other	172.3	152.1	143.1
Total revenue	1,076.2	953.2	873.9
Operating expenses:
Employee compensation and benefits	352.5	322.8	292.7
Long-term incentive compensation	76.8	51.3	63.1
Marketing and advertising	22.0	19.5	20.2
Distribution	141.0	131.0	125.7
Depreciation and amortization	33.0	25.6	28.7
General, administrative and occupancy	128.6	113.3	104.4
Total operating expenses	753.9	663.5	634.8
Operating Income	322.3	289.7	239.1
Interest expense	(27.7)	(33.1)	(41.1)
Investment gains (losses), net	(8.2)	(1.9)	6.5
Other income (expense), net	3.2	3.0	4.5
Loss on early extinguishment of debt	(36.3)		(13.5)
Income before taxes	253.3	257.7	195.5
Income tax provision	(94.0)	(102.3)	(73.3)
Net income	159.3	155.4	122.2
Noncontrolling interests	(3.5)	(1.0)	(7.5)
Net income attributable to JCG	$ 155.8	$ 154.4	$ 114.7
Earnings per share attributable to JCG common shareholders:
Basic (in dollars per share)	$ 0.84	$ 0.82	$ 0.62
Diluted (in dollars per share)	$ 0.80	$ 0.81	$ 0.62
Other comprehensive loss, net of tax:
Net unrealized gain (loss) on available-for-sale securities	$ (2.2)	$ 1.9	$ 0.1
Foreign currency loss	(4.3)
Reclassification for items included in net income	(1.0)	(2.2)	(1.8)
Total other comprehensive (loss), net of tax	(7.5)	(0.3)	(1.7)
Comprehensive income	151.8	155.1	120.5
Comprehensive income attributable to noncontrolling interests	(3.5)	(1.0)	(7.5)
Comprehensive income attributable to JCG	$ 148.3	$ 154.1	$ 113.0