| Pension Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 9 Months Ended | 
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| Sep. 28, 2013 | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Defined benefit pension plan contributed | $ 113.3 | 
| Defined benefit pension plan, discretionary contribution | 100.0 | 
| Defined benefit pension plan additional contributions during the remainder of the year | $ 6.5 | 
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- Definition The increase in the fair value of plan assets from contributions made by the employer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period. No definition available. 
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. No definition available. 
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