| Share-Based Compensation (Tables) | 3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr. 01, 2017 | |||||||||||||||||||||||||||||||||||||||||||
| Share-based Compensation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||
| Fair Value Assumptions for Performance Awards | 
The fair values of the senior executives' performance share award grants with a TSR modifier for grants in 2017 and 2016 were $64.82 and $38.54, respectively, which were estimated using the Monte Carlo valuation model, and incorporated the following assumptions:
 
 | ||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
| 
- Definition Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block] No definition available. 
 | 
| X | ||||||||||
| 
- References No definition available. 
 |