Schedule of Defined Benefit Pension Plan Balances with Accumulated Benefit Obligation Exceeded Fair Value of Plan Assets (Detail) (USD $) In Millions, unless otherwise specified	Sep. 28, 2012	Sep. 30, 2011
Retirement Plans [Abstract]
Projected benefit obligation	$ 76.4	$ 65.6
Accumulated benefit obligation	71.1	61.5
Fair value of plan assets	$ 62.9	$ 51.6

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details

If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details

- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details