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Commitments and Contingencies (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended
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Oct. 31, 2012 | Dec. 28, 2013 Subsidiary Claimant Entity | Dec. 29, 2012 | Dec. 31, 2011 | Dec. 28, 2013 Consulting Agreement [Member] | Dec. 28, 2013 Facilities Vehicles and Equipment [Member] | Dec. 29, 2012 Facilities Vehicles and Equipment [Member] | Dec. 31, 2011 Facilities Vehicles and Equipment [Member] | Dec. 28, 2013 United States Department of Commerce and United States International Trade Commission Antidumping Investigation [Member] Subsidiary | Dec. 28, 2013 United States Department of Commerce and United States International Trade Commission Antidumping Investigation [Member] IUSA in Mexico [Member] | Dec. 28, 2013 United States Department of Commerce and United States International Trade Commission Antidumping Investigation [Member] Luvata in Mexico [Member] | Oct. 01, 2010 United States Department of Commerce and United States International Trade Commission Antidumping Investigation [Member] Luvata in Mexico [Member] | Dec. 28, 2013 United States Department of Commerce and United States International Trade Commission Antidumping Investigation [Member] Haliang in China [Member] | Dec. 28, 2013 United States Department of Commerce and United States International Trade Commission Antidumping Investigation [Member] Luvata in China [Member] | Oct. 01, 2010 United States Department of Commerce and United States International Trade Commission Antidumping Investigation [Member] Luvata in China [Member] | Nov. 22, 2010 United States Department of Commerce and United States International Trade Commission Antidumping Investigation [Member] Department of Commerce [Member] | Oct. 01, 2010 United States Department of Commerce and United States International Trade Commission Antidumping Investigation [Member] Department of Commerce [Member] | Mar. 31, 2012 Insurance Settlement [Member] Fulton, Mississippi [Member] | Dec. 25, 2010 Insurance Settlement [Member] Fulton, Mississippi [Member] | Dec. 28, 2013 Insurance Settlement [Member] Wynne, Arkansas [Member] | Dec. 29, 2012 Insurance Settlement [Member] Wynne, Arkansas [Member] | Dec. 31, 2011 Insurance Settlement [Member] Wynne, Arkansas [Member] | Dec. 31, 2011 Litigation Settlement [Member] | Dec. 28, 2013 United States Department of Commerce Antidumping Review [Member] | Apr. 19, 2010 United States Department of Commerce Antidumping Review [Member] | Dec. 27, 2008 United States Department of Commerce Antidumping Review [Member] | Dec. 28, 2013 Operating Properties [Member] Mueller Copper Tube Products, Inc. [Member] | Dec. 28, 2013 Non-Operating Properties [Member] Southeast Kansas Sites [Member] Party | Dec. 28, 2013 Non-Operating Properties [Member] Shasta Area Mine Sites [Member] | Dec. 28, 2013 Non-Operating Properties [Member] Lead Refinery Site [Member] | Dec. 29, 2012 Non-Operating Properties [Member] Lead Refinery Site [Member] | Dec. 31, 2011 Non-Operating Properties [Member] Lead Refinery Site [Member]
Site Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental expense |  | $ 1.0 | $ 3.1 | $ 0.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.1 | $ 0.1 | $ 0.1
Environmental spending |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.7 |  |  |
Environmental reserves |  | 23.6 | 24.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.5 |  |  |  |
Expected environmental expenditures for 2014 |  | 1.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected environmental expenditures for 2015 |  | 0.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected environmental expenditures for 2016 |  | 0.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected environmental expenditures for 2017 |  | 0.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected environmental expenditures for 2018 |  | 0.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected environmental expenditures after 2018 |  | 9.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of parties involved in settlement negotiations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |
Period of permit, implementation of Best Management Practices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 years 6 months | 10 years |  |  |
Mitigation estimates minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.9 |  | 10.0 | 2.1 |  |
Mitigation estimates maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13.6 | 2.9 |  |
Estimated number of years until mitigation resolution |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  | 20 years | 20 years |  |
Number of entities that received letters from counsel regarding copper tube |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of entities that received letters from counsel regarding copper fittings |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of claimants |  | 21 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lead Refinery Site [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
EPA's estimated cost of site remediation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30.0 |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assignment of antidumping duty rate on U.S. imports by Company subsidiaries (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19.80% | 48.30% |  |  |  |  |  |  |
Assigned antidumping duty rate (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.50% |  |  |  |  |  |  |  |
Reserve established |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.1 |  | 3.1 |  |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of subsidiaries jointly filed antidumping petitions |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Final antidumping rates minimum (in hundredths) |  |  |  |  |  |  |  |  |  |  |  | 24.89% |  |  | 11.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Final antidumping rates maximum (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28.16% | 28.16% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period when DOC conducted a new shipper review |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash deposit requirements (in hundredths) |  |  |  |  |  |  |  |  |  | 24.89% | 28.16% |  | 60.85% | 36.05% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance settlement proceeds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 127.3 |  |  |  |  |  |  |  |  |  |  |  |
Insurance claim deductible amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.5 |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax gain from settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.5 | 1.5 | 106.3 |  |  | 10.5 |  |  |  |  |  |  |  |  |
Pre-tax gain from settlement (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.33 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from insurance company received |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62.3 | 55.0 | 10.0 |  |  |  |  |  |  |  |  |  |
Supplier Litigation [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of subsidiaries that filed related to supplier litigation |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash payment for litigation settlement amount | 5.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Canadian Dumping and Countervail Investigation [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial period of potential antidumping duties |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Potential additional antidumping term |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease payments scheduled for 2014 |  |  |  |  |  | 6.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease payments scheduled for 2015 |  |  |  |  |  | 5.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease payments scheduled for 2016 |  |  |  |  |  | 4.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease payments scheduled for 2017 |  |  |  |  |  | 3.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease payments scheduled for 2018 |  |  |  |  |  | 2.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease payments scheduled after 2018 |  |  |  |  |  | 1.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease expense |  |  |  |  |  | 9.1 | 8.5 | 8.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consulting agreement term (in years) |  |  |  |  | 6 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial period of the consulting agreement |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial period rate of pay based on final base compensation (in hundredths) |  |  |  |  | two-thirds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Final period of the consulting agreement |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Final period rate of pay of based on final base compensation (in hundredths) |  |  |  |  | one-third |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining amount payable under the Consulting agreement |  |  |  |  | $ 4.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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