Stock-Based Compensation - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Dec. 29, 2012	Dec. 24, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	2.1	2.0
Weighted average exercise prices	$ 19.86	$ 17.02
Share-based compensation, stock option outstanding	19.0
Weighted average exercise price of options outstanding	$ 17.86
Restricted stock units	1.8	1.5
Restricted stock units(RSU), weighted average grant date fair values	$ 19.86	$ 17.08
Unvested RSUs outstanding	4.2
Unvested RSUs weighted average grant date fair value	$ 18.00
Market stock units granted during the period	0.1
Valuation of MSUs using Monte Carlo simulation model	$ 18.49
Minimum eligible percentage to receive target number of shares of company's common stock	0.00%
Maximum eligible percentage to receive target number of shares of company's common stock	200.00%
Percentage of forfeiture rate, minimum	0.00%
Percentage of forfeiture rate, maximum	7.00%
Stock option plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, period of vest term granted to employees, years	5 years
Percentage of vesting for stock granted to employees	20.00%
Unrecognized compensation expense	$ 54.1
Weighted average period for recognition of unrecognized stock-based compensation, years	3 years 6 months
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, period of vest term granted to employees, years		4 years
Percentage of vesting for stock granted to employees		25.00%
Unrecognized compensation expense	$ 66.1
Weighted average period for recognition of unrecognized stock-based compensation, years	3 years 1 month 6 days

Fair Value Per Share Based On Monte Carlo Simulation

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Market Stock Units Granted During the Period

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Maximum target number percentage of shares issued based on stock performance.

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Minimum target number percentage of shares that would be issued based on stock price performance.

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Represents the percentage of stock options that vest annually per the terms of the typical stock option grant arrangement.

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No definition available.

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Maximum forfeiture rate applied to equity awards issued to certain employee groups to determine stock-based compensation expense for the period. The rate is based on an analysis of historical employee exercise and terminations patterns.

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Minimum forfeiture rate applied to equity awards issued to certain employee groups to determine stock-based compensation expense for the period. The rate is based on an analysis of historical employee exercise and terminations patterns.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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Net number of share options (or share units) granted during the period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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