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Debt and Financing Activities - Revolving Credit Facilities and Lines of Credit (Details) € in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($) | Mar. 31, 2015 USD ($) | Oct. 29, 2015 USD ($) | Sep. 30, 2015 EUR (€) | Sep. 30, 2015 USD ($)
Revolving Credit Facility |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Syndicated senior unsecured revolving credit facility |  |  |  |  |  |  | $ 1,300,000,000
Debt Instrument, Term |  | 5 years |  |  |  |  |
Syndicated unsecured revolving credit facility expiration date |  | Sep. 23, 2016 |  |  |  |  |
Interest rate description |  | bear interest based upon either the London Interbank Offered Rate or a prime rate |  |  |  |  |
Borrowings under the facility |  | $ 0 | $ 0 |  |  |  |
Amounts outstanding under facility |  |  |  | $ 0 |  |  | 0
Revolving Credit Facility | Celesio |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Syndicated senior unsecured revolving credit facility |  |  |  |  |  |  | 1,300,000,000
Borrowings under the facility |  | 618,000,000 | 207,000,000 |  |  |  |
Amounts outstanding under facility |  |  |  | 29,000,000 |  |  | 31,000,000
Repayments amount under credit lines |  | $ 616,000,000 | 33,000,000 |  |  |  |
Revolving Credit Facility | Celesio | Revolving Credit Facility Due February 2018 |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Syndicated senior unsecured revolving credit facility | € |  |  |  |  |  | € 500 |
Syndicated unsecured revolving credit facility expiration date |  | Feb. 28, 2018 |  |  |  |  |
Borrowings under the facility |  | $ 0 | 0 |  |  |  |
Amounts outstanding under facility |  |  |  | 0 |  |  | 0
New Credit Facility | Subsequent Event |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Syndicated senior unsecured revolving credit facility |  |  |  |  | $ 3,500,000,000 |  |
Credit facility, aggregate sublimit | $ 3,150,000,000 |  |  |  |  |  |
Debt to capital covenant ratio |  |  |  |  | 0.65 |  |
Accounts Receivable Sales Facility |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |
Syndicated senior unsecured revolving credit facility |  |  |  |  |  |  | 1,350,000,000
Borrowings under the facility |  | $ 0 |  |  |  |  |
Amounts outstanding under facility |  |  |  | $ 0 |  |  | $ 0
Covenant compliance |  |  |  | we were in compliance with all covenants |  |  |
Repayments amount under credit lines |  |  | $ 0 |  |  |  |

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- Definition Line of Credit Facility, Aggregate Sublimit + References No definition available. + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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- Definition Identification of whether the entity has been in compliance with any credit facility debt covenants during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + 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 + Details
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- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + 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 + Details
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- 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 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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