Consolidated Statement of Changes in Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income	Non-Controlling Interest
Balance at Dec. 31, 2010	$ 845.6	$ 1.0	$ 247.7	$ 3,039.8	$ (2,815.4)	$ 351.3	$ 21.2
Balance (in shares) at Dec. 31, 2010		46.3
Comprehensive income:
Net income attributable to DST Systems, Inc.	183.1			183.1
Net loss attributable to non-controlling interests	(4.9)						(4.9)
Other comprehensive income (loss)	(73.5)					(73.5)
Dividends	(31.5)		0.1	(31.6)
Amortization of share based compensation	20.5		20.5
Issuance of common stock	67.9		(26.1)		94.0
Issuance of common stock (in shares)		1.6
Repurchase of common stock	(174.7)				(174.7)
Repurchase of common stock (in shares)		(3.8)
Other	3.2		3.8				(0.6)
Balance at Dec. 31, 2011	835.7	1.0	246.0	3,191.3	(2,896.1)	277.8	15.7
Balance (in shares) at Dec. 31, 2011		44.1
Comprehensive income:
Exchange of non-controlling interest			(2.0)
Balance at Jan. 31, 2012
Balance at Dec. 31, 2011	835.7	1.0	246.0	3,191.3	(2,896.1)	277.8	15.7
Balance (in shares) at Dec. 31, 2011		44.1
Comprehensive income:
Net income attributable to DST Systems, Inc.	324.0			324.0
Net loss attributable to non-controlling interests	0
Other comprehensive income (loss)	(21.0)					(21.0)
Dividends	(36.0)		1.6	(37.6)
Amortization of share based compensation	25.5		25.5
Issuance of common stock	73.4		(37.1)		110.5
Issuance of common stock (in shares)		2.0
Repurchase of common stock	(104.5)				(104.5)
Repurchase of common stock (in shares)		(1.8)
Exchange of non-controlling interest	(17.7)		(2.0)				(15.7)
Other	0.3		0.3
Balance at Dec. 31, 2012	1,079.7	1.0	234.3	3,477.7	(2,890.1)	256.8	0
Balance (in shares) at Dec. 31, 2012		44.3
Comprehensive income:
Net income attributable to DST Systems, Inc.	352.6			352.6
Net loss attributable to non-controlling interests	0
Other comprehensive income (loss)	51.4					51.4
Dividends	(51.8)		0.8	(52.6)
Amortization of share based compensation	16.9		16.9
Issuance of common stock	41.9		(34.2)		76.1
Issuance of common stock (in shares)		1.3
Repurchase of common stock	(276.4)				(276.4)
Repurchase of common stock (in shares)		(3.8)
Convertible debenture premium	(30.9)		(30.9)
Other	0.4		0.4
Balance at Dec. 31, 2013	$ 1,183.8	$ 1.0	$ 187.3	$ 3,777.7	$ (3,090.4)	$ 308.2	$ 0
Balance (in shares) at Dec. 31, 2013		41.8