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Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Sep. 25, 2015	Jun. 26, 2015	Jun. 27, 2014	Jun. 26, 2015	Jun. 27, 2014
Accelerated Share Repurchases [Abstract]
Accelerated share repurchases initial payment		$ 60,000		$ 60,000
Accelerated share repurchases initial shares		742,880		742,880
Accelerated share repurchases fair value of initial shares		$ 54,000		$ 54,000
Accelerated share repurchases settlement shares hypothetical		90,000		90,000
Accelerated share repurchases settlement shares received	94,515
Accelerated share repurchases final price paid per share	$ 71.65
Changes in components of AOCI
Beginning Balance	$ (88,627)	$ (102,211)	$ (45,675)	$ (100,736)	$ (46,349)
Other comprehensive income before reclassifications		12,404	(1,908)	9,393	(1,994)
Amounts reclassified from accumulated other comprehensive income		1,180	789	2,716	1,549
Ending Balance		(88,627)	(46,794)	(88,627)	(46,794)
Reclassification detail
Reclassification after tax		1,180	789	2,716	1,549
Pension and Postretirement Medical
Changes in components of AOCI
Beginning Balance	(73,868)	(75,048)	(49,372)	(76,584)	(50,132)
Other comprehensive income before reclassifications		0	0	0	0
Amounts reclassified from accumulated other comprehensive income		1,180	789	2,716	1,549
Ending Balance		(73,868)	(48,583)	(73,868)	(48,583)
Reclassification detail
Reclassification before tax		1,919	1,225	4,357	2,413
Income tax (benefit)		(739)	(436)	(1,641)	(864)
Reclassification after tax		1,180	789	2,716	1,549
Pension and Postretirement Medical | Cost of products sold
Reclassification detail
Reclassification before tax		707	440	1,645	876
Pension and Postretirement Medical | Product development
Reclassification detail
Reclassification before tax		319	195	702	382
Pension and Postretirement Medical | Selling, marketing and distribution
Reclassification detail
Reclassification before tax		529	354	1,232	689
Pension and Postretirement Medical | General and administrative
Reclassification detail
Reclassification before tax		364	236	778	466
Cumulative Translation Adjustment
Changes in components of AOCI
Beginning Balance	$ (14,759)	(27,163)	3,697	(24,152)	3,783
Other comprehensive income before reclassifications		12,404	(1,908)	9,393	(1,994)
Amounts reclassified from accumulated other comprehensive income		0	0	0	0
Ending Balance		(14,759)	1,789	(14,759)	1,789
Reclassification detail
Reclassification after tax		$ 0	$ 0	$ 0	$ 0

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Fair value of initial shares delivered in an accelerated share repurchase plan

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Hypothetical amount of shares received in the settlement of the accelerated share repurchase agreement assuming no change in market price during purchase period.

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Tax effect of reclassification adjustments of other comprehensive income (loss).

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Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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