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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status.

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Retirement and Post Retirement Health Care Plans (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016	Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer Contributions	$ 8,600,000	$ 9,200,000
Retirement plan, reduction of expense	2,900,000
Accumulated benefit obligation	$ 251,700,000	$ 232,900,000
Defined benefit plan compensation increase assumption	3.00%	3.00%
Expected contribution to defined benefit pension plans	$ 8,300,000
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer Contributions	8,600,000	$ 9,200,000
Future amortization of prior service cost	200,000
Amount to be amortized	$ 3,500,000
Discount Rate	3.80%	4.30%
Postretirement Health Coverage
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer Contributions	$ 900,000	$ 1,200,000
Amount to be amortized	0
Expected contribution to defined benefit pension plans	$ 900,000
Discount Rate	3.50%	3.90%
Health care cost trend rate, 2025	4.50%
Effect of percentage point change in health care cost trend rate	$ 300,000
Postretirement Health Coverage \| Forecast
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Health care cost trend rate, 2025				4.50%
Minimum \| Postretirement Health Coverage
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Health care cost trend rate, next fiscal year	7.00%
Minimum \| Postretirement Health Coverage \| Forecast
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Health care cost trend rate, next fiscal year				8.00%
Maximum \| Postretirement Health Coverage
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Health care cost trend rate, next fiscal year	5.40%
Maximum \| Postretirement Health Coverage \| Forecast
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Health care cost trend rate, next fiscal year				5.40%
Domestic Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer Contributions	$ 9,300,000	$ 8,700,000	$ 9,900,000
International Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer Contributions	$ 9,400,000	$ 10,400,000	$ 9,200,000