Acquisitions (Narrative) (Details) Share data in Millions, except Per Share data, unless otherwise specified	9 Months Ended		0 Months Ended		1 Months Ended	12 Months Ended
	Sep. 26, 2014 USD ($) Businesses	Sep. 27, 2013 USD ($)	Sep. 26, 2014 Nobel Biocare USD ($)	Dec. 31, 2013 Nobel Biocare USD ($)	Sep. 26, 2014 Nobel Biocare CHF	Dec. 31, 2013 Nobel Biocare EUR (€)	Sep. 26, 2014 Nobel Biocare USD ($)	Oct. 15, 2014 Subsequent Event Nobel Biocare
Businesses acquired (businesses)	15
Cash paid for acquisitions	$ (634,900,000)	$ (868,600,000)
Aggregate annual sales of additional businesses	250,000,000			780,000,000		567,000,000
Goodwill	323,100,000
Business acquisition, share price							$ 17.10
Business combination, consideration transferred			$ 2,100,000,000		2,000,000,000
Business acquisition percentage of voting interests acquired							67.00%	14.00%
Investment owned, balance, shares								17