Discontinued Operations Discontinued Operations (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of tax	$ 18.7	$ 12.0	$ 37.2	$ 26.7
Discontinued Operations, Held-for-sale | Customer Communications
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenues	151.7	151.1	311.5	306.7
Out-of-pocket reimbursements	184.1	179.9	389.4	370.9
Total revenues	335.8	331.0	700.9	677.6
Costs and expenses	314.7	305.9	649.8	622.2
Depreciation and amortization	5.7	8.1	11.9	16.1
Operating income	15.4	17.0	39.2	39.3
Interest expense	0.0	(0.3)	0.0	(0.3)
Other income, net	0.0	0.1	0.0	0.1
Equity in earnings of unconsolidated affiliates	0.3	0.1	0.2	0.3
Income before income taxes	15.7	16.9	39.4	39.4
Income taxes	(3.0)	4.9	2.2	12.7
Income from discontinued operations, net of tax	$ 18.7	$ 12.0	$ 37.2	$ 26.7