Long-Term Debt and Capital Leases (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Jan. 01, 2012
Summary of Long-Term Debt
Total Long Term Debt	$ 632.5	$ 298.0
4.04% Senior Notes due September 2015 [Member]
Summary of Long-Term Debt
Total Long Term Debt	75.0	75.0
4.74% Senior Notes due September 2017 [Member]
Summary of Long-Term Debt
Total Long Term Debt	100.0	100.0
5.30% Senior Notes due September 2020 [Member]
Summary of Long-Term Debt
Total Long Term Debt	75.0	75.0
Other debt at various rates due through 2018 (excluding the current portion) [Member]
Summary of Long-Term Debt
Total Long Term Debt	14.7	0
$550.0 million revolving credit facility, weighted average rate of 1.68% at September 30, 2012 and 2.48% at January 1, 2012 [Member]
Summary of Long-Term Debt
Total Long Term Debt	$ 367.8	$ 48.0