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Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 25, 2010 | Dec. 26, 2009
Principles of consolidation [Abstract] |  |  |
Non-controlling ownership interest of Mueller-Xingrong (in hundredths) | 49.50% |  |
Cash equivalents [Abstract] |  |  |
Temporary investments | $ 322.1 | $ 315.9 |
Restricted cash | 13.0 | 9.2 |
Fair value of financial instruments [Abstract] |  |  |
Fair value of the Company's debt instruments | 197.0 | 189.9 |
Foreign currency translation [Abstract] |  |  |
Foreign currency transaction losses | $ 0.7 | $ 2.2 | $ 0.2
Stock Options [Member] |  |  |
Earnings per share [Abstract] |  |  |
Stock options were excluded from the computation of diluted earnings per share (in shares) |  | 1.3 | 1.2
Buildings [Member] |  |  |
Property, Plant and Equipment [Abstract] |  |  |
Property, Plant and equipment estimated useful lives, minimum (in years) | 20 |  |
Property, Plant and equipment estimated useful lives, maximum (in years) | 40 |  |
Machinery and Equipment [Member] |  |  |
Property, Plant and Equipment [Abstract] |  |  |
Property, Plant and equipment estimated useful lives, minimum (in years) | 5 |  |
Property, Plant and equipment estimated useful lives, maximum (in years) | 20 |  |

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