Unconsolidated Affiliates (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Unconsolidated affiliates
Carrying value	$ 296.7		$ 296.7		$ 288.1
Equity in earnings (losses) of unconsolidated affiliates	10.2	3.8	25.2	18.9
Boston Financial Data Services, Inc.
Unconsolidated affiliates
Ownership percentage	50.00%		50.00%
Carrying value	77.0		77.0		72.5
Equity in earnings (losses) of unconsolidated affiliates	1.5	1.8	4.5	6.1
International Financial Data Services (U.K. and L.P.)
Unconsolidated affiliates
Ownership percentage	50.00%		50.00%
Carrying value	183.9		183.9		179.0
Equity in earnings (losses) of unconsolidated affiliates	7.2	1.0	10.3	8.9
Unconsolidated real estate and other affiliates
Unconsolidated affiliates
Carrying value	35.8		35.8		36.6
Equity in earnings (losses) of unconsolidated affiliates	$ 1.5	$ 1.0	$ 10.4	$ 3.9