Employee Pension and Profit Sharing Plans - Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 28, 2012	Sep. 30, 2011	Oct. 01, 2010
Compensation and Retirement Disclosure [Abstract]
Defined contribution cost recognized	$ 29.5	$ 31.5	$ 26.1
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	279.4	205.5
Actuarial losses in other comprehensive income (loss) before taxes	(22.8)	(9.8)
Settlement gains in other comprehensive income (loss) before taxes	0.3	0.7
Amortization of actuarial losses recognized as net periodic pension cost	(0.6)	(0.9)
Net actuarial loss included in accumulated other comprehensive income (loss) to be recognized in next fiscal year	$ (3.6)	$ (2.3)

For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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- Definition

Before tax amount of the gain (loss) adjustment to other comprehensive income (loss) resulting from the settlement or curtailment of the entity's defined benefit pension and other postretirement plans.

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