Commitments and Contingencies - Summary of Contingent Consideration Charges Recorded to the Consolidated Statement of Operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Other Contingencies And Commitments [Line Items]
Contingent consideration – compensation expense	$ 0	$ 80.0	$ 81.0
Contingent consideration – fair value adjustments	0	11.3	38.5
Contingent consideration expense		91.3	119.5
Sentinelle Medical [Member]
Other Contingencies And Commitments [Line Items]
Contingent consideration – compensation expense			0
Contingent consideration – fair value adjustments			(3.3)
Contingent consideration expense			(3.3)
Interlace Medical, Inc [Member]
Other Contingencies And Commitments [Line Items]
Contingent consideration – compensation expense		0	0
Contingent consideration – fair value adjustments		11.3	41.8
Contingent consideration expense		11.3	41.8
TCT International Co., Ltd. [Member]
Other Contingencies And Commitments [Line Items]
Contingent consideration – compensation expense		80.0	75.5
Contingent consideration – fair value adjustments		0	0
Contingent consideration expense		80.0	75.5
Healthcome [Member]
Other Contingencies And Commitments [Line Items]
Contingent consideration – compensation expense			5.5
Contingent consideration – fair value adjustments			0
Contingent consideration expense			$ 5.5