Goodwill and Other Intangible Assets - Table 1 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Apr. 30, 2013
Schedule of Changes in the Carrying Amount of Goodwill
Goodwill, Beginning Balance	$ 437.3	$ 421.7	$ 420.3	$ 13.7
Goodwill, Acquisitions	13.7	0	1.4
Goodwill, Period Increase		15.6
Goodwill, Written off Related to Sale of Business Unit	(0.3)
Goodwill, Ending Balance	456.9	437.3	421.7	13.7
Consolidation of Joint Venture [Member]
Schedule of Changes in the Carrying Amount of Goodwill
Goodwill, Period Increase		15.6
Conversion of wholly owned subsidiary to joint venture [Member]
Schedule of Changes in the Carrying Amount of Goodwill
Goodwill, Period Increase	$ 6.2