Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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

-Publisher FASB

-Name Accounting Standards Codification

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The upper end of the range of quotients represented as a percentage derived by dividing the change in value of a hedging instrument by the change in the value of the hedged item over the assessment period.

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The lower end of the range of quotients represented as a percentage derived by dividing the change in value of a hedging instrument by the change in the value of the hedged item over the assessment period.

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The change in the inventory reserve representing the cumulative difference in cost between the first in, first out and the last in, first out inventory valuation methods, which change has been reflected in the statement of income during the period.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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The percentage of direct ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

No definition available.

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The percentage of indirect ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Represents equity method ownership option to repurchase shares amount.

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Element refers to less than 100% percentage to consolidate subsidiaries accounts.

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No definition available.

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Basis of Presentation (Details) (USD $)	3 Months Ended	6 Months Ended		0 Months Ended
Basis of Presentation (Details) (USD $)	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014	Aug. 31, 2014	Dec. 31, 2014	Jun. 18, 2012	Jan. 01, 2015	Mar. 18, 2013
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in hundredths)		45.00%
Common shares transfer (in shares)		1,172,513,618us-gaap_CommonStockSharesIssued		1,028,180,150us-gaap_CommonStockSharesIssued
Restricted Cash [Abstract]
Restricted cash		$ 206,000,000		$ 0
Financial Instruments [Abstract]
Minimum highly effective hedging percentage (in hundredths)		80.00%
Maximum highly effective hedging percentage (in hundredths)		125.00%
Income Taxes [Abstract]
Unrecognized tax benefits		115,000,000us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefits will decrease in the next 12 months		115,000,000
Non controlling Interest [Abstract]
Threshold percentage to consolidated subsidiaries accounts (in hundredths)		100.00%
Currency [Abstract]
Net gain (loss) from foreign currency transactions	0	0	0
Retail Pharmacy USA [Member]
Inventory [Abstract]
Inventory increase in carrying amount if valued on LIFO basis		2,400,000,000		2,300,000,000
Alliance Boots [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in hundredths)		100.00%		45.00%	45.00%	45.00%
Walgreens Boots Alliance Development GmbH [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in hundredths)		72.50%
Additional ownership interest, direct (in hundredths)		50.00%
Additional ownership interest, indirect (in hundredths)		27.50%
Equity method ownership option to repurchase shares, amount		$ 100,000
Alliance Healthcare Italia Distribuzione S.p.A. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in hundredths)							5.00%
Common shares transfer (in shares)		320
AmerisourceBergen Corporation [Member] \| Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Common shares transfer (in shares)								19,859,795