Pensions and Other Benefit Plans - Rates Used to Develop Actuarial Present Value of Projected Benefit Obligation (Details)	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Retirement Plans
Weighted average assumptions used in calculating net periodic benefit cost
Discount rate assumption NPBC	3.98%	3.78%	4.78%
Interest cost discount rate	4.24%	3.78%	4.78%
Rate of increase in compensation levels NPBC	4.02%	4.05%	4.08%
Expected long-term rate of return on plan assets assumption NPBC	8.55%	8.53%	8.46%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate assumption benefit obligation	3.78%	4.11%	3.78%
Rate of compensation increase benefit obligation	4.02%	4.01%	4.05%
Other Benefit Plans
Weighted average assumptions used in calculating net periodic benefit cost
Discount rate assumption NPBC	4.77%	4.31%	5.25%
Interest cost discount rate	4.10%	4.31%	5.25%
Rate of increase in compensation levels NPBC	4.32%	4.11%	4.29%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate assumption benefit obligation	4.42%	4.63%	4.31%
Rate of compensation increase benefit obligation	4.29%	4.28%	4.11%