Other Long-Term Liabilities (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Other Long-Term Liabilities [Abstract]
Long-term deferred compensation arrangements	$ 22.8	$ 23.4
Long-term portion of derivative liabilities	14.6	25.7
U.S. workers' compensation	7.6	8.4
Postemployment benefit liabilities	6.3	7.2
Environmental liabilities	7.7	10.7
Other	10.2	11.2
Total other long-term liabilities	$ 69.2	$ 86.6