Stockholders' Equity and Noncontrolling Interests - Schedule of Amounts Reclassified Out of Other Comprehensive Earnings (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Jan. 01, 2016	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Jan. 02, 2015	Sep. 30, 2016	Oct. 02, 2015	Sep. 26, 2014
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Revenues	$ 912.5	$ 789.4	$ 758.8	$ 757.1	$ 817.8	$ 784.0	$ 759.4	$ 737.9	$ 3,217.8	$ 3,099.1	$ 3,049.8
Operating expenses									(810.5)	(733.7)	(730.5)
Total amounts reclassified out of other comprehensive loss	$ 117.5	$ 98.8	$ 97.0	$ 89.0	$ 98.7	$ 113.5	$ 106.0	$ 93.3	402.3	411.5	403.7
Net Unrealized Gains (Losses) Defined Benefit Pension and Post-Retirement Benefit Plans
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Cost of revenues & Operating expenses									(2.4)	(2.1)	(2.3)
Net Unrealized Gains (Losses) Cash Flow Hedging Instruments
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Cost of revenues & Operating expenses									(1.0)	3.8	1.3
Net Unrealized Gains (Losses) Available-for- Sale Securities
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Cost of revenues & Operating expenses									(0.6)	0.0	0.0
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Total amounts reclassified out of other comprehensive loss									(4.0)	1.7	(1.0)
Reclassification out of Accumulated Other Comprehensive Income | Net Unrealized Gains (Losses) Cash Flow Hedging Instruments
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Revenues									(1.0)	3.8	1.3
Reclassification out of Accumulated Other Comprehensive Income | Net Unrealized Gains (Losses) Available-for- Sale Securities
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Operating expenses									$ (0.6)	$ 0.0	$ 0.0