Business Acquisitions and Divestitures Business Acquisitions and Divestitures (Summarized Financial Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of tax	$ (160.7)	$ 2.4	$ 0.8	$ 12.9	$ 0.8	$ 3.7	$ 0	$ 0	$ (144.6)	$ 4.5	$ 0
1-800 Contacts [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues									434.7	214.5
Income from discontinued operations before tax									17.3	7.2
Income tax (benefit) expense									(2.6)	2.7
Income from discontinued operations									19.9	4.5
Loss on disposal from discontinued operations, net of tax									(164.5)	0
Discontinued operations, net of tax									$ (144.6)	$ 4.5