Debt and Financing Activities	3 Months Ended
Jun. 30, 2014
Debt Disclosure [Abstract]
Debt and Financing Activities	Debt and Financing Activities Celesio Debt Upon the acquisition of Celesio, as required, we consolidated Celesio’s debt including corporate bonds consisting of 4.00% bonds due October 18, 2016 and 4.50% bonds due April 26, 2017. At June 30, 2014 and March 31, 2014, $500 million and $507 million of the 4.00% bonds and $726 million and $737 million of the 4.50% bonds, for a total of $1,226 million and $1,244 million, were outstanding. As of March 31, 2014, these bonds were classified within current liabilities as bondholders had the option to redeem the bonds at par value plus accrued interest. This redemption option expired during the first quarter of 2015 and the remaining bonds outstanding will mature according to their respective maturity dates. Accordingly, as of June 30, 2014, these bonds have been classified as long-term debt. We also consolidated Celesio’s accounts receivable factoring facilities (the “Factoring Facilities”) with a total committed and uncommitted balance of $315 million. The Factoring Facilities will expire through September 2015. During the first quarter of 2015, Celesio borrowed and repaid $758 million and $746 million of short-term borrowings under the Factoring Facilities. At June 30, 2014 and March 31, 2014, there were $258 million and $246 million in secured borrowings and related securitized accounts receivable outstanding under the Factoring Facilities. Celesio also maintains a syndicated €500 million five-year senior unsecured revolving credit facility, which expires in February 2018. Borrowings under this facility bear interest based upon the Euro Interbank Offered Rate plus an agreed margin. There were no borrowings under this facility during the first quarter of 2015 and there were no amounts outstanding under this facility as of June 30, 2014 and March 31, 2014. Celesio also maintains bilateral credit lines with a total committed and uncommitted balance of $2.0 billion. During the first quarter of 2015, Celesio borrowed and repaid $159 million and $30 million under these credit lines primarily relating to short‑term borrowings. As of June 30, 2014 and March 31, 2014, there were $321 million and $188 million outstanding under these credit lines. Accounts Receivable Sales Facility We have an accounts receivable sales facility (the “Facility”) with a committed balance of $1.35 billion, although from time to time, the available amount of the Facility may be less than $1.35 billion based on accounts receivable concentration limits and other eligibility requirements. The Facility will expire in November 2014 and we anticipate renewing the Facility before its expiration. During the first quarter of 2015, there were no borrowings under the Facility. During the first quarter of 2014, we borrowed and repaid $100 million of short-term borrowings under the Facility. At June 30, 2014 and March 31, 2014, there were no short‑term borrowings and related securitized accounts receivable outstanding under the Facility. The Facility contains requirements relating to the performance of the accounts receivable and covenants relating to the Company. If we do not comply with these covenants, our ability to use the Facility may be suspended and repayment of any outstanding balances under the Facility may be required. At June 30, 2014 and March 31, 2014, we were in compliance with all covenants. Revolving Credit Facility We have a syndicated $1.3 billion five-year senior unsecured revolving credit facility, which expires in September 2016. Borrowings under this facility bear interest based upon either the London Interbank Offered Rate or a prime rate. There were no borrowings under this facility during the first quarters of 2015 and 2014. As of June 30, 2014 and March 31, 2014, there were no amounts outstanding under this facility.

Debt and Financing Activities

Celesio Debt

Upon the acquisition of Celesio, as required, we consolidated Celesio’s debt including corporate bonds consisting of 4.00% bonds due October 18, 2016 and 4.50% bonds due April 26, 2017. At June 30, 2014 and March 31, 2014, $500 million and $507 million of the 4.00% bonds and $726 million and $737 million of the 4.50% bonds, for a total of $1,226 million and $1,244 million, were outstanding. As of March 31, 2014, these bonds were classified within current liabilities as bondholders had the option to redeem the bonds at par value plus accrued interest. This redemption option expired during the first quarter of 2015 and the remaining bonds outstanding will mature according to their respective maturity dates. Accordingly, as of June 30, 2014, these bonds have been classified as long-term debt.

We also consolidated Celesio’s accounts receivable factoring facilities (the “Factoring Facilities”) with a total committed and uncommitted balance of $315 million. The Factoring Facilities will expire through September 2015. During the first quarter of 2015, Celesio borrowed and repaid $758 million and $746 million of short-term borrowings under the Factoring Facilities. At June 30, 2014 and March 31, 2014, there were $258 million and $246 million in secured borrowings and related securitized accounts receivable outstanding under the Factoring Facilities.

Celesio also maintains a syndicated €500 million five-year senior unsecured revolving credit facility, which expires in February 2018. Borrowings under this facility bear interest based upon the Euro Interbank Offered Rate plus an agreed margin. There were no borrowings under this facility during the first quarter of 2015 and there were no amounts outstanding under this facility as of June 30, 2014 and March 31, 2014.

Celesio also maintains bilateral credit lines with a total committed and uncommitted balance of $2.0 billion. During the first quarter of 2015, Celesio borrowed and repaid $159 million and $30 million under these credit lines primarily relating to short‑term borrowings. As of June 30, 2014 and March 31, 2014, there were $321 million and $188 million outstanding under these credit lines.

Accounts Receivable Sales Facility

We have an accounts receivable sales facility (the “Facility”) with a committed balance of $1.35 billion, although from time to time, the available amount of the Facility may be less than $1.35 billion based on accounts receivable concentration limits and other eligibility requirements. The Facility will expire in November 2014 and we anticipate renewing the Facility before its expiration.

During the first quarter of 2015, there were no borrowings under the Facility. During the first quarter of 2014, we borrowed and repaid $100 million of short-term borrowings under the Facility. At June 30, 2014 and March 31, 2014, there were no short‑term borrowings and related securitized accounts receivable outstanding under the Facility.

The Facility contains requirements relating to the performance of the accounts receivable and covenants relating to the Company. If we do not comply with these covenants, our ability to use the Facility may be suspended and repayment of any outstanding balances under the Facility may be required. At June 30, 2014 and March 31, 2014, we were in compliance with all covenants.

Revolving Credit Facility

We have a syndicated $1.3 billion five-year senior unsecured revolving credit facility, which expires in September 2016. Borrowings under this facility bear interest based upon either the London Interbank Offered Rate or a prime rate. There were no borrowings under this facility during the first quarters of 2015 and 2014. As of June 30, 2014 and March 31, 2014, there were no amounts outstanding under this facility.