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The interest rate used to adjust for the time value of money for the plan.

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An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

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Amount before tax of gain (loss) adjustment to other comprehensive income (loss) resulting from settlement or curtailment of defined benefit pension and other postretirement defined benefit plans.

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Amount after tax, before reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement benefit plans.

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The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

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Amount of asset retirement obligations settled through noncash transactions. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset.

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Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended		3 Months Ended
	Nov. 29, 2014	Nov. 30, 2013	Nov. 29, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Excess pension contributions required	$ 47us-gaap_PensionContributions
Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Excess pension contributions required	120
Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Excess pension contributions required	125
Multi-employer Postretirement Benefit Plans Other than Pensions [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Contribution to multi-employer Plans	29	28
Lump Sum Pension Settlement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Lump sum settlement payments			267
Non-cash pension settlement charge			63
Remeasurement, discount rate	4.10%		4.10%
Expected rate of return			6.50%
Other comprehensive income, pre-tax			200
Other comprehensive income, after-tax			$ 141