CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Aug. 13, 2016	Aug. 15, 2015	Aug. 13, 2016	Aug. 15, 2015
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Realized and unrealized gain (loss) on available for sale securities, income tax	$ (13)	$ 3	$ (16)	$ 4
Amortization of amounts included in net periodic pension expense, income tax	5	8	10	17
Unrealized gains (losses) on cash flow hedging activities, income tax	$ (43)	$ (2)	$ (58)	$ 10

Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss), attributable to parent entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569616-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569643-111683

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration