Acquisitions and Divestitures (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 28, 2013
Jun. 29, 2012
Jun. 28, 2013
Jun. 29, 2012
Oct. 01, 2012
ProCables S.A. [Member]
Rest of World [Member]
Jun. 28, 2013
ProCables S.A. [Member]
Rest of World [Member]
Jun. 28, 2013
ProCables S.A. [Member]
Rest of World [Member]
Dec. 31, 2011
ProCables S.A. [Member]
Rest of World [Member]
Oct. 01, 2012
ProCables S.A. [Member]
Rest of World [Member]
Minimum [Member]
employees
Nov. 02, 2012
Prestolite [Member]
Jun. 28, 2013
Prestolite [Member]
Jun. 28, 2013
Prestolite [Member]
Dec. 31, 2011
Prestolite [Member]
Nov. 02, 2012
Prestolite [Member]
Minimum [Member]
employees
Oct. 01, 2012
Seller [Member]
ProCables S.A. [Member]
Rest of World [Member]
Jun. 28, 2013
North America [Member]
Jun. 29, 2012
North America [Member]
Jun. 28, 2013
North America [Member]
Jun. 29, 2012
North America [Member]
Sep. 04, 2012
North America [Member]
Alcan Cable [Member]
Jun. 28, 2013
North America [Member]
Alcan Cable [Member]
Jun. 28, 2013
North America [Member]
Alcan Cable [Member]
Dec. 31, 2011
North America [Member]
Alcan Cable [Member]
Jun. 28, 2013
North America [Member]
Alcan Cable [Member]
Minimum [Member]
employees
Dec. 03, 2012
CHINA [Member]
Alcan Cable [Member]
Jun. 28, 2013
CHINA [Member]
Alcan Cable [Member]
Jun. 28, 2013
CHINA [Member]
Alcan Cable [Member]
Dec. 31, 2011
CHINA [Member]
Alcan Cable [Member]
Dec. 03, 2012
CHINA [Member]
Alcan Cable [Member]
Minimum [Member]
employees
Business Acquisition [Line Items]                                                          
Cost of acquired entity, purchase price         $ 18.3         $ 59.5                   $ 151.0         $ 57.7        
Customary adjustment, primarily related to working capital                                       20.3                  
Cash paid for acquired entity                                       171.3                  
Selling, general and administrative expenses 122.0 106.1 [1] 246.1 200.9 [1] 0.6         0.6                   3.3         1.1        
Number of employees                 500         700                   750         300
Net sales 1,659.1 1,475.2 [1] 3,202.8 2,924.7 [1]   40.9 70.5       50.7 105.0       706.5 548.0 1,411.5 1,089.2   100.5 244.7 610.0     29.0 45.4    
Operating income 70.8 67.6 [1] 103.6 121.9 [1]             3.8 1.8       43.7 36.6 81.4 67.0   8.3 24.2       3.7      
Percentage of interests acquired         60.00%                                                
Ownership percentage by noncontrolling owners                             40.00%                            
Ownership by noncontrolling owners, value                             27.4                            
Repayments of debt         24.0                                                
Existing debt         48.1                                                
Term after no-transfer period that shareholders may exercise         36 months                                                
No-transfer period of put options         4 years                                                
Ownership percentage by parent                             40.00%                            
Percentage of voting interests to be purchased         40.00%                                                
Revenues $ 1,659.1 $ 1,475.2 $ 3,202.8 $ 2,924.7       $ 120.0         $ 170.0                             $ 65.0  
[1] See Note 23 - Restatement of Condensed Consolidated Financial Statements