Other Long-Term Liabilities (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Other Long-Term Liabilities
Deferred taxes and other tax liabilities	$ 234.3	$ 246.1
Pension and other post-retirement obligations	23.7	23.9
Long-term workers compensation	17.0	17.0
Deferred credits	14.6	14.4
Deferred compensation	9.8	7.7
Other	1.5	1.6
Other long-term liabilities	$ 300.9	$ 310.7