Segment Information (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
Segment Reporting [Abstract]
Number of operating segments			3
Summary of financial information of segments
Total assets	$ 2,993.3		$ 2,993.3		$ 3,090.5
Operating revenues	509.6	485.1	1,014.8	980.3
Out-of-pocket reimbursements	169.9	172.0	348.5	359.2
Total revenues	679.5	657.1	1,363.3	1,339.5
Costs and expenses	576.1	551.3	1,159.8	1,125.9
Depreciation and amortization	32.1	33.1	64.1	66.3
Income from operations	71.3	72.7	139.4	147.3
Other income (loss), net	131.2	28.4	224.8	101.6
Equity in earnings of unconsolidated affiliates	9.6	9.5	15.0	15.1
Earnings (loss) before interest and income taxes	212.1	110.6	379.2	264.0
Interest expense	7.0	9.3	13.6	18.9
Intersegment Eliminations [Member]
Summary of financial information of segments
Total assets	(61.8)		(61.8)		(63.4)
Operating revenues	(25.2)	(22.8)	(50.1)	(45.9)
Out-of-pocket reimbursements	(2.6)	(1.7)	(5.1)	(3.7)
Total revenues	(27.8)	(24.5)	(55.2)	(49.6)
Costs and expenses	(25.0)	(22.0)	(49.9)	(44.4)
Depreciation and amortization	(0.7)	(0.7)	(1.3)	(1.3)
Income from operations	(2.1)	(1.8)	(4.0)	(3.9)
Other income (loss), net	0	0	0	0
Equity in earnings of unconsolidated affiliates	0	0	0	0
Earnings (loss) before interest and income taxes	(2.1)	(1.8)	(4.0)	(3.9)
Intersegment Eliminations [Member] | Financial Services
Summary of financial information of segments
Operating revenues	12.0	10.3	24.1	21.1
Intersegment Eliminations [Member] | Healthcare Services
Summary of financial information of segments
Operating revenues	0	0	0	0
Intersegment Eliminations [Member] | Customer Communications
Summary of financial information of segments
Operating revenues	2.3	2.0	4.4	4.0
Intersegment Eliminations [Member] | Investments and Other
Summary of financial information of segments
Operating revenues	10.9	10.5	21.6	20.8
Operating Segments [Member]
Summary of financial information of segments
Operating revenues	509.6	485.1	1,014.8	980.3
Operating Segments [Member] | Financial Services
Summary of financial information of segments
Total assets	1,436.8		1,436.8		1,422.5
Operating revenues	254.6	238.4	498.9	476.4
Out-of-pocket reimbursements	12.6	11.1	26.3	23.1
Total revenues	279.2	259.8	549.3	520.6
Costs and expenses	211.6	192.6	427.5	390.2
Depreciation and amortization	16.6	15.5	33.3	31.3
Income from operations	51.0	51.7	88.5	99.1
Other income (loss), net	17.9	1.9	20.1	(2.6)
Equity in earnings of unconsolidated affiliates	7.8	8.1	11.7	11.6
Earnings (loss) before interest and income taxes	76.7	61.7	120.3	108.1
Operating Segments [Member] | Healthcare Services
Summary of financial information of segments
Total assets	325.4		325.4		336.6
Operating revenues	92.9	82.0	184.9	162.0
Out-of-pocket reimbursements	1.6	1.4	3.0	2.7
Total revenues	94.5	83.4	187.9	164.7
Costs and expenses	83.0	67.3	159.8	136.8
Depreciation and amortization	4.8	4.7	9.7	9.4
Income from operations	6.7	11.4	18.4	18.5
Other income (loss), net	0	0	0	0.1
Equity in earnings of unconsolidated affiliates	0.2	0.1	0.3	0.2
Earnings (loss) before interest and income taxes	6.9	11.5	18.7	18.8
Operating Segments [Member] | Customer Communications
Summary of financial information of segments
Total assets	397.1		397.1		403.0
Operating revenues	158.3	160.8	323.7	334.0
Out-of-pocket reimbursements	158.2	161.2	324.2	337.1
Total revenues	318.8	324.0	652.3	675.1
Costs and expenses	297.5	304.7	604.6	625.8
Depreciation and amortization	9.4	11.0	18.4	21.8
Income from operations	11.9	8.3	29.3	27.5
Other income (loss), net	0.1	0.5	0.2	(0.3)
Equity in earnings of unconsolidated affiliates	0.2	0	0.6	0.1
Earnings (loss) before interest and income taxes	12.2	8.8	30.1	27.3
Operating Segments [Member] | Investments and Other
Summary of financial information of segments
Total assets	895.8		895.8		991.8
Operating revenues	3.8	3.9	7.3	7.9
Out-of-pocket reimbursements	0.1	0	0.1	0
Total revenues	14.8	14.4	29.0	28.7
Costs and expenses	9.0	8.7	17.8	17.5
Depreciation and amortization	2.0	2.6	4.0	5.1
Income from operations	3.8	3.1	7.2	6.1
Other income (loss), net	113.2	26.0	204.5	104.4
Equity in earnings of unconsolidated affiliates	1.4	1.3	2.4	3.2
Earnings (loss) before interest and income taxes	$ 118.4	$ 30.4	$ 214.1	$ 113.7