Retirement Benefit Plans (Weighted-Average Asset Allocations) (Details)	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	8.30%	8.30%	8.30%
Weighted-average asset allocations	100.00%	100.00%
U.S. Pension Benefits [Member] | International Stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	10.00%	10.00%
U.S. Pension Benefits [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	64.00%	64.00%
U.S. Pension Benefits [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	36.00%	36.00%
U.S. Pension Benefits [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	0.00%	0.00%
U.S. Pension Benefits [Member] | Cash and Money Market Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	0.00%	0.00%
U.S. Pension Benefits [Member] | Large U.S. Stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	33.00%	33.00%
U.S. Pension Benefits [Member] | Small U.S. Stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	21.00%	21.00%
U.S. Pension Benefits [Member] | Guaranteed Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	0.00%	0.00%
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	3.80%	4.40%	4.10%
Weighted-average asset allocations	100.00%	100.00%
Foreign Pension Benefits [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	29.00%	37.00%
Foreign Pension Benefits [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	17.00%	15.00%
Foreign Pension Benefits [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	1.00%	1.00%
Foreign Pension Benefits [Member] | Cash and Money Market Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	7.00%	3.00%
Foreign Pension Benefits [Member] | Guaranteed Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	46.00%	44.00%
Japan | Foreign Pension Benefits [Member] | Equity Securities, Japanese Companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	51.00%	52.00%
Japan | Foreign Pension Benefits [Member] | Equity Securities, Companies Outside of Japan [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	7.00%	8.00%
Australia | Foreign Pension Benefits [Member] | Equity Securities, Companies Outside of Australia [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations	43.00%	40.00%