Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

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- Definition

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount of gain (loss) from the difference between the repurchase price of a debt instrument initially issued by the entity and the net carrying amount of the debt at the time of its repurchase.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Average amount borrowed under the credit facility during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Period Type:	instant

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Notes Payable and Long-Term Debt - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jun. 30, 2014	Jan. 30, 2016	Jan. 31, 2015
Debt Instrument [Line Items]
Repurchase amount of debt before maturity	$ 725,000,000
Loss on early retirement	285,000,000
Balances outstanding		$ 0	$ 0
Revolving credit facility		2,250,000,000.00	2,250,000,000.00
Debt Repurchase 2
Debt Instrument [Line Items]
Payment of debt maturities	1,000,000,000
Unsecured Debt
Debt Instrument [Line Items]
Unsecured fixed rate debt	1,000,000,000
Unsecured Debt \| Unsecured Fixed Rate 2.3 Percent Debt, Maturing June 2019
Debt Instrument [Line Items]
Unsecured fixed rate debt	$ 1,000,000,000
Fixed interest rate	2.30%
Unsecured Debt \| Unsecured Fixed Rate 3.5 Percent Debt, Maturing July 2024
Debt Instrument [Line Items]
Unsecured fixed rate debt	$ 1,000,000,000
Fixed interest rate	3.50%
Other Noncurrent Assets \| New Accounting Pronouncement, Early Adoption, Effect
Debt Instrument [Line Items]
Deferred issuance costs		(63,000,000)	(71,000,000)
Long term Debt and Other Borrowings \| New Accounting Pronouncement, Early Adoption, Effect
Debt Instrument [Line Items]
Deferred issuance costs		$ 63,000,000	$ 71,000,000