Acquisitions and Other Investments - BLS (Narrative) (Details) (Bottom Line Services [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
	Dec. 31, 2012	Dec. 02, 2012
Business Acquisition [Line Items]
Effective date of acquisition	Dec. 01, 2012
Business combination, percentage of voting interests acquired		100.00%
Acquisition payments in cash		$ 67.6
Earn-out Arrangements [Member]
Business Acquisition [Line Items]
Earn-out period		5 years
Estimated fair value of contingent consideration		$ 11.1