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Long-Term Obligations and Other Short-Term Borrowings (Narrative) (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Jun. 30, 2013 USD ($) | Dec. 31, 2014 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2013 USD ($) | Mar. 31, 2015 USD ($) | Nov. 30, 2014 USD ($) | Sep. 30, 2014 USD ($) | Feb. 28, 2013 USD ($)
Debt Instrument |  |  |  |  |  |  |  |  |  |
Maturities of existing long-term obligations and other short-term borrowings - 2016 |  |  |  | $ 281,000,000 |  |  |  |  |  |
Maturities of existing long-term obligations and other short-term borrowings - 2017 |  |  |  | 310,000,000 |  |  |  |  |  |
Maturities of existing long-term obligations and other short-term borrowings - 2018 |  |  |  | 956,000,000 |  |  |  |  |  |
Maturities of existing long-term obligations and other short-term borrowings - 2019 |  |  |  | 2,000,000 |  |  |  |  |  |
Maturities of existing long-term obligations and other short-term borrowings - 2020 |  |  |  | 452,000,000 |  |  |  |  |  |
Maturities of existing long-term obligations and other short-term borrowings - thereafter |  |  |  | 3,491,000,000 |  |  |  |  |  |
Accounts payable |  |  |  | 14,368,000,000 | $ 12,149,000,000 |  |  |  |  |
Loss on extinguishment of debt |  |  | $ 60,000,000 | 60,000,000 | 0 | $ 0 |  |  |  |
Loss on extniguishment of debt, net of tax |  |  | 37,000,000 |  |  |  |  |  |  |
Make-whole premium |  |  | 80,000,000 |  |  |  |  |  |  |
Unamortized debt issuance costs |  |  | 2,000,000 |  |  |  |  |  |  |
Fair value adjustment related to previously terminated swaps |  |  | $ 22,000,000 |  |  |  |  |  |  |
Other obligations |  |  |  | $ 312,000,000 | 319,000,000 |  |  |  |  |
1.7% Notes due 2018 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 1.70% |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  | $ 400,000,000
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
1.9% Notes due 2017 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 1.90% |  |  |  |  |  |
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
1.95% Notes due 2018 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 1.95% |  |  |  |  |  |
Principal amount of debt |  |  |  | $ 550,000,000 |  |  |  |  |  |
Redemption price (as a percentage) |  |  |  | 101.00% |  |  |  |  |  |
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
2.4% Notes due 2019 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 2.40% |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  | $ 450,000,000 |  |
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
3.2% Notes due 2022 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 3.20% |  |  |  |  |  |
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
3.2% Notes due 2023 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 3.20% |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  | 550,000,000
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
3.5% Notes due 2024 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 3.50% |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  | 400,000,000 |  |
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
3.75% Notes due 2025 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 3.75% |  |  |  |  |  |
Principal amount of debt |  |  |  | $ 500,000,000 |  |  |  |  |  |
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
4.5% Notes due 2044 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 4.50% |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  | $ 350,000,000 |  |
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
4.6% Notes due 2043 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 4.60% |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  | $ 350,000,000
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
4.625% Notes due 2020 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 4.625% |  |  |  |  |  |
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
4.9% Notes due 2045 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 4.90% |  |  |  |  |  |
Principal amount of debt |  |  |  | $ 450,000,000 |  |  |  |  |  |
Redemption price (as a percentage) |  |  |  | 101.00% |  |  |  |  |  |
Offer as percentage of principal amount |  |  |  | 101.00% |  |  |  |  |  |
7.0% Debentures due 2026 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 7.00% |  |  |  |  |  |
7.8% Debentures due 2016 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 7.80% |  |  |  |  |  |
4.0% Notes due 2015 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 4.00% |  |  |  |  |  |
Redemption price (as a percentage) | 100.00% |  |  |  |  |  |  |  |  |
5.8% Notes due 2016 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 5.80% |  |  |  |  |  |
Redemption price (as a percentage) | 100.00% |  |  |  |  |  |  |  |  |
5.85% Notes due 2017 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 5.85% |  |  |  |  |  |
Redemption price (as a percentage) | 100.00% |  |  |  |  |  |  |  |  |
6.0% Notes due 2017 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 6.00% |  |  |  |  |  |
Redemption price (as a percentage) | 100.00% |  |  |  |  |  |  |  |  |
5.5% Notes due 2013 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  | 5.50% |  |  |  | 5.50% |  |  |  |
Repayments of Debt |  | $ 300,000,000 |  |  |  |  |  |  |  |
Committed Receivables Sales Facility Program |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | $ 950,000,000 |  |  |  |  | $ 700,000,000 |
Stand by letters of credit outstanding |  |  |  | $ 41,000,000 | 41,000,000 |  |  |  |  |
Cordis |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Bridge loan |  |  |  |  |  |  | $ 1,000,000,000 |  |  |
Fees incurred on debt |  |  |  |  |  |  | $ 4,000,000 |  |  |
Allegiance Corporation | 7.0% Debentures due 2026 |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  | 7.00% |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | $ 1,500,000,000.0 | 1,500,000,000.0 |  |  |  |  |
Revolving Credit Facility | Committed Receivables Sales Facility Program |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Interest coverage ratio |  |  |  | 4 |  |  |  |  |  |
Leverage ratio |  |  |  | 3.25 |  |  |  |  |  |
Commercial Paper |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | $ 1,500,000,000 | 1,500,000,000.0 |  |  |  |  |
Short Term Credit Facilities |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | 439,000,000 | $ 369,000,000 |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Commercial Paper |  |  |  | 0 |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |
Commercial Paper |  |  |  | $ 100,000,000 |  |  |  |  |  |

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