Benefit Plans - Summary of Changes in Fair Value for Level 3 Investments (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Feb. 22, 2014	Feb. 23, 2013	Feb. 25, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	$ 2,261	$ 2,031
Real estate partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	149	136
Private equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	125	110
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at end of year	274	246
Level 3 [Member] \| Real estate partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Purchases	22	15
Sales	(26)
Unrealized gains	10	8
Realized gains and losses	7
Fair value of plan assets at end of year	149	136	113
Level 3 [Member] \| Private equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Purchases	34	20
Sales	(24)	(7)
Unrealized gains	5	9
Fair value of plan assets at end of year	$ 125	$ 110	$ 88

Defined benefit plan fair value of plan assets purchases.

No definition available.

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- Definition

Defined benefit plan fair value of plan assets sales.

+ References

No definition available.

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- Definition

Actual return on plan assets, separately identifying the amount related to assets still held at the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(iv)(02)(A)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)(iv)(02)(A)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920

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- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930

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- Definition

The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.3(a))

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 325

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6485959&loc=d3e22529-158502

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 3

-Subparagraph a

-Article 7

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