Segment Reporting (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Revenue, Major Customer [Line Items]
Number of business segments	4
American Express Corp. [Member]
Revenue, Major Customer [Line Items]
Concentration of sales by customer	10.00%
Percent of total consolidated revenues from customer	26.60%	25.40%
Accounts receivable from customer	$ 17.5		$ 19.1
American Express Corp. [Member] | Applications Outsourcing [Member]
Revenue, Major Customer [Line Items]
Total consolidated revenue from customer	45.4	36.9
Percent of total consolidated revenues from customer	100.00%	100.00%
State Street Bank [Member]
Revenue, Major Customer [Line Items]
Concentration of sales by customer	10.00%
Total consolidated revenue from customer	28.9	25.9
Percent of total consolidated revenues from customer	16.90%	17.80%
Accounts receivable from customer	$ 14.4		$ 13.7
State Street Bank [Member] | Applications Outsourcing [Member]
Revenue, Major Customer [Line Items]
Percent of total consolidated revenues from customer	26.00%	24.00%
State Street Bank [Member] | KPO [Member]
Revenue, Major Customer [Line Items]
Concentration of sales by customer	14.50%	15.50%
Percent of total consolidated revenues from customer	74.00%	76.00%