Fair Value Measurements, Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Assets
Cash equivalents	$ 61.3	$ 377.1
Investments in mutual funds, unit trusts and other similar instruments	35.7	35.6
Insurance contracts	60.2	56.7
Auction rate securities	4.3	4.3
Derivative contracts	0.3	0.9
Total Assets	161.8	474.6
Liabilities
Derivative contracts	0.5	1.2
Contingent consideration	16.8	1.7
Total Liabilities	17.3	2.9
Quoted Prices in Active Markets (Level I) [Member]
Assets
Cash equivalents	61.3	377.1
Investments in mutual funds, unit trusts and other similar instruments	35.7	35.6
Total Assets	97.0	412.7
Significant Other Observable Inputs (Level 2) [Member]
Assets
Insurance contracts	60.2	56.7
Derivative contracts	0.3	0.9
Total Assets	60.5	57.6
Liabilities
Derivative contracts	0.5	1.2
Total Liabilities	0.5	1.2
Significant Unobservable Inputs (Level 3) [Member]
Assets
Auction rate securities	4.3	4.3
Total Assets	4.3	4.3
Liabilities
Contingent consideration	16.8	1.7
Total Liabilities	$ 16.8	$ 1.7