Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income attributable to DST Systems, Inc.	$ 427.3	$ 358.2	$ 593.3
Other comprehensive loss, net of tax and reclassifications to earnings:
Unrealized holding gains (losses) on available-for-sale securities	10.1	(123.2)	(93.6)
Unrealized gains on cash flow hedges	0.0	0.2	0.2
Foreign currency translation adjustments	(35.4)	(22.0)	(27.9)
Other comprehensive loss	(25.3)	(145.0)	(121.3)
Comprehensive income	$ 402.0	$ 213.2	$ 472.0