Schedule of Reserve for Future Environmental Costs (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2013
Commitments And Contingencies [Line Items]
2014	$ 2.3
2015	1.0
2016	1.1
2017	1.0
2018	1.2
Thereafter	7.7
Total costs	14.3
Less imputed interest	(3.0)
Reserve amount	11.3
Recurring Costs
Commitments And Contingencies [Line Items]
2014	0.6
2015	0.6
2016	0.7
2017	0.8
2018	0.7
Thereafter	6.3
Total costs	9.7
Non-Recurring Costs
Commitments And Contingencies [Line Items]
2014	1.7
2015	0.4
2016	0.4
2017	0.2
2018	0.5
Thereafter	1.4
Total costs	$ 4.6