Other Long-Term Liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Other Long-Term Liabilities
Deferred taxes and other tax liabilities	$ 246.1	$ 253.8
Pension and other post-retirement obligations	23.9	19.1
Long-term workers compensation	17.0	16.6
Deferred credits	14.4	9.1
Deferred compensation	7.7	5.5
Other	1.6	2.8
Other long-term liabilities	$ 310.7	$ 306.9