Financial Information for Reportable Segments (Parenthetical) (Detail) $ in Millions  | 
3 Months Ended | 
|---|---|
| 
 Apr. 04, 2015  
USD ($) 
 | |
| Segment Reporting Information [Line Items] | |
| Gain on sale of business | $ 16.6 | 
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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