Schedule of Estimated Future Benefit Payments (Detail) (USD $) In Millions, unless otherwise specified	Sep. 26, 2014
Defined Benefit Plan Disclosure [Line Items]
2015	$ 5.6
2016	5.1
2017	7.4
2018	7.4
2019	8.0
2020-2024	38.4
Defined Benefit Plan, Expected Future Benefit Payments, Total	71.9
Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
2015	5.3
2016	4.9
2017	7.2
2018	7.3
2019	7.9
2020-2024	38.0
Defined Benefit Plan, Expected Future Benefit Payments, Total	70.6
Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
2015	0.3
2016	0.2
2017	0.2
2018	0.1
2019	0.1
2020-2024	0.4
Defined Benefit Plan, Expected Future Benefit Payments, Total	$ 1.3

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Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of benefits from a defined benefit plan expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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+ References

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