Unconsolidated Affiliates (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Unconsolidated affiliates
Carrying value	$ 297.2		$ 297.2		$ 288.1
Equity in earnings (losses) of unconsolidated affiliates	9.6	9.5	15.0	15.1
Boston Financial Data Services, Inc.
Unconsolidated affiliates
Ownership percentage	50.00%		50.00%
Carrying value	75.5		75.5		72.5
Equity in earnings (losses) of unconsolidated affiliates	1.2	2.5	3.0	4.3
International Financial Data Services (U.K. and L.P.)
Unconsolidated affiliates
Ownership percentage	50.00%		50.00%
Carrying value	186.2		186.2		179.0
Equity in earnings (losses) of unconsolidated affiliates	1.0	6.1	3.1	8.0
Unconsolidated real estate and other affiliates
Unconsolidated affiliates
Carrying value	35.5		35.5		36.6
Equity in earnings (losses) of unconsolidated affiliates	$ 7.4	$ 0.9	$ 8.9	$ 2.8