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Financial Instruments and Derivative Instruments (Details 4) (USD $) In Millions, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011
Long-term debt
Carrying amount	$ 385.1	$ 399.4
Estimated fair value	$ 422.7	$ 440.5
5.47% notes due May 2013
Senior notes
Interest rate (as a percent)	5.47%
5.85% notes due April 2016
Senior notes
Interest rate (as a percent)	5.85%
5.05% notes due June 2020
Senior notes
Interest rate (as a percent)	5.05%

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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