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Restructuring and Divestiture Charges - Charges Taken Related to Restructuring Actions (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended							12 Months Ended						3 Months Ended	12 Months Ended
	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012	Sep. 29, 2012 Fiscal 2012 Charges [Member] Restructuring Charges [Member]	Sep. 28, 2013 Fiscal 2013 Charges [Member] Restructuring Charges [Member]	Sep. 27, 2014 Fiscal 2014 Charges [Member] Restructuring Charges [Member]	Mar. 24, 2012 Adiana Permanent Contraception System [Member] Fiscal 2012 Charges [Member] Restructuring Charges [Member]	Sep. 29, 2012 Adiana Permanent Contraception System [Member] Fiscal 2012 Charges [Member] Restructuring Charges [Member]	Sep. 28, 2013 Adiana Permanent Contraception System [Member] Fiscal 2013 Charges [Member] Restructuring Charges [Member]	Sep. 27, 2014 Adiana Permanent Contraception System [Member] Fiscal 2014 Charges [Member] Restructuring Charges [Member]	Sep. 29, 2012 Consolidation of Diagnostics Operations [Member] Fiscal 2012 Charges [Member] Restructuring Charges [Member]	Sep. 28, 2013 Consolidation of Diagnostics Operations [Member] Fiscal 2013 Charges [Member] Restructuring Charges [Member]	Sep. 27, 2014 Consolidation of Diagnostics Operations [Member] Fiscal 2014 Charges [Member] Restructuring Charges [Member]	Sep. 29, 2012 Closure of Indianapolis Facility [Member] Fiscal 2012 Charges [Member] Restructuring Charges [Member]	Sep. 28, 2013 Closure of Indianapolis Facility [Member] Fiscal 2013 Charges [Member] Restructuring Charges [Member]	Sep. 27, 2014 Closure of Indianapolis Facility [Member] Fiscal 2014 Charges [Member] Restructuring Charges [Member]	Sep. 29, 2012 Fiscal 2014 Actions [Member] Fiscal 2012 Charges [Member] Restructuring Charges [Member]	Sep. 28, 2013 Fiscal 2014 Actions [Member] Fiscal 2013 Charges [Member] Restructuring Charges [Member]	Sep. 27, 2014 Fiscal 2014 Actions [Member] Fiscal 2014 Charges [Member] Restructuring Charges [Member]	Sep. 29, 2012 Fiscal 2013 Actions [Member] Fiscal 2012 Charges [Member] Restructuring Charges [Member]	Sep. 28, 2013 Fiscal 2013 Actions [Member] Fiscal 2013 Charges [Member] Restructuring Charges [Member]	Sep. 27, 2014 Fiscal 2013 Actions [Member] Fiscal 2014 Charges [Member] Restructuring Charges [Member]	Sep. 29, 2012 Other Operating Cost Reductions [Member] Fiscal 2012 Charges [Member] Restructuring Charges [Member]	Sep. 28, 2013 Other Operating Cost Reductions [Member] Fiscal 2013 Charges [Member] Restructuring Charges [Member]	Sep. 27, 2014 Other Operating Cost Reductions [Member] Fiscal 2014 Charges [Member] Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Non-cash impairment charges								$ 38.4	$ 9.4	$ 16.9	$ 16.9	$ 0.1	$ 3.1		$ 16.3	$ 0	$ 0	$ 0.6	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0.1	$ 3.1
Purchase orders and other contractual obligations											3.1				3.1			0			0			0			0			0
Workforce reductions											15.2	31.2	42.2		0.1	0	0	14.2	14.0	2.9	0.9	4.8	0.2	0	0	29.5	0	11.3	0.9	0	1.1	8.7
Facility closure costs											0.4	0.6	0.6		0	0	0	0	0	0	0	0.2	0.5	0	0	0	0	0	0	0.4	0.4	0.1
Other											0.9	0.9	0.3		0	0	0	0	0	0.1	0.9	0.7	0	0	0	0	0	0	0	0	0.2	0.2
Fiscal restructuring charges											36.5	32.7	46.2		19.5	0	0	14.8	14.0	3.0	1.8	5.7	0.7	0	0	29.5	0	11.3	0.9	0.4	1.7	12.1
Divestiture net charges												0.1	5.5
Fiscal restructuring and divestiture charges	15.1	6.7	11.6	18.4	9.7	6.7	12.5	51.7	32.8	17.5	36.5	32.8	51.7	18.3	19.5			14.8			1.8			0			0			0.4
Restructuring Charges Included In Cost Of Sales															19.0
Restructuring Charges And Associated Cost															$ 0.5

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Represents charges incurred to close or restructure a facility in connection with an exit or disposal activity. Such costs include clean-up costs and lease obligations. Costs are recorded as the activities are incurred except for lease obligation charges, which are recorded upon termination of the lease obligation or at the cease use date.

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Charges in the period for purchase orders and other contractual obligations related to exit or disposal activities that the Company is required to pay.

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Represents severance and related benefit charges for the termination of employees under an exit or disposal activity. Charges are recorded either as one-time termination benefits, which are recognized ratable over the required service period to receive such benefit, or under an ongoing benefit plan arrangement once the charge is probable and reasonably estimable.

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Restructuring charges included in cost of sales.

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Total restructuring charges under exit or disposal plan.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.

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