Unconsolidated Affiliates (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Amounts and transactions with related party unconsolidated affiliates
DST's operating revenues from unconsolidated affiliates	$ 200.7		$ 201.8		$ 218.6
Intangible assets acquired in exchange for installment note	0		0		10.7
Unconsolidated affiliates
Amounts and transactions with related party unconsolidated affiliates
DST's operating revenues from unconsolidated affiliates	170.5		171.5		188.2
Amounts paid by DST to unconsolidated affiliates for products, services and leases	22.1		21.5		11.2
Distributions received by DST from unconsolidated affiliates	137.3		6.4		16.1
Amounts receivable to DST from advances to unconsolidated affiliates	10.2		11.4
Trade accounts receivable to DST from unconsolidated affiliates	14.6		17.1
Amounts receivable to DST from unconsolidated affiliates	24.8		28.5
Amounts payable by DST to unconsolidated affiliates	2.9	[1]	2.2	[1]
Goodwill and intangible assets	3.1		4.8
Unconsolidated affiliates | Boston Financial Data Services, Inc.
Amounts and transactions with related party unconsolidated affiliates
Deferred revenue by DST from unconsolidated affiliates					40.0
Unconsolidated affiliates | Customer relationship assets | Boston Financial Data Services, Inc.
Amounts and transactions with related party unconsolidated affiliates
Intangible assets acquired in exchange for installment note					10.7
Amortization period (in years)					10 years
Installment period (in years)					5 years
Principal amount outstanding	5.8
Unconsolidated affiliates | Software license | Percana Limited
Amounts and transactions with related party unconsolidated affiliates
Intangible assets acquired					$ 2.0

[1] Excludes amounts owed under or activity related to the BFDS promissory note and IFDS, U.K. promissory note. See additional discussion of promissory notes within Note 10 of these financial statements.