Retirement Plans (Schedule Of Future Cash Flows) (Details) - USD ($)	6 Months Ended
	Oct. 02, 2016	Apr. 10, 2016	Jan. 01, 2015
Defined Benefit Plan Disclosure [Line Items]
Minimum required contribution for retirement plans			$ 0
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer		$ 7,617,000
Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer		$ 638,000
Scenario, Forecast [Member] | Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	$ 16,900,000
Scenario, Forecast [Member] | Postretirement Healthcare Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year	$ 700,000