ACQUISITIONS AND OTHER ARRANGEMENTS - Additional Information (Details) | Sep. 30, 2021USD ($) | Sep. 02, 2021USD ($)$ / shares | Sep. 01, 2021USD ($) | Jul. 31, 2021USD ($) | Mar. 31, 2021USD ($) | Feb. 28, 2021USD ($) | Sep. 30, 2021USD ($) | Sep. 30, 2020USD ($) | Sep. 30, 2021USD ($) | Sep. 30, 2020USD ($) |
Business Acquisition [Line Items] | | | | | | | | | | |
Payments to acquire productive assets | | | | | | | | | $ 508,000,000 | $ 472,000,000 |
Net sales | | | | | | | $ 3,226,000,000 | $ 2,972,000,000 | 9,270,000,000 | $ 8,492,000,000 |
Caelyx and Doxil | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Payments to acquire productive assets | | | | | | $ 325,000,000 | | | | |
Net sales | | | | | | | 32,000,000 | | 73,000,000 | |
Customer Relationships | Caelyx and Doxil | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Weighted-average useful life | | | | | | 8 years | | | | |
Payments to acquire productive assets | | | | | | $ 11,000,000 | | | | |
Developed Technology Intangible Asset | Caelyx and Doxil | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Weighted-average useful life | | | | | | 9 years | | | | |
Payments to acquire productive assets | | | | | | $ 314,000,000 | | | | |
Bridge Facility | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Debt instrument term | | | 364 days | | | | | | | |
364-day Senior Unsecured Bridge Term Loan | Bridge Facility | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Senior notes | | | $ 11,400,000,000 | | | | | | | |
Period after which upfront fee will increase | | | 120 days | | | | | | | |
364-day Senior Unsecured Bridge Term Loan | Bridge Facility | Minimum | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Upfront fee (percent) | | | $ 40,000,000 | | | | | | | |
364-day Senior Unsecured Bridge Term Loan | Bridge Facility | Maximum | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Debt instrument term | | | 364 days | | | | | | | |
Upfront fee (percent) | | | $ 53,000,000 | | | | | | | |
Undrawn commitments ticking fee (percent) | | | 0.125% | | | | | | | |
364-day Senior Unsecured Bridge Term Loan | Bridge Facility | 90th day after initial funding | Maximum | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Duration fee (percent) | | | 0.50% | | | | | | | |
364-day Senior Unsecured Bridge Term Loan | Bridge Facility | 180th day after initial funding | Maximum | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Duration fee (percent) | | | 0.75% | | | | | | | |
364-day Senior Unsecured Bridge Term Loan | Bridge Facility | 270th day after initial funding | Maximum | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Duration fee (percent) | | | 1.00% | | | | | | | |
Term Loan Credit Agreement | Term Loan Facility | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Fees under the credit facilities (percent) | 0.125% | | | | | | | | | |
Line of credit facility, maximum borrowing capacity | $ 4,000,000,000 | | | | | | $ 4,000,000,000 | | $ 4,000,000,000 | |
Term Loan Credit Agreement | Term Loan Facility | First year | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Loans annual amortization rate (percent) | 0.625% | | | | | | 0.625% | | 0.625% | |
Term Loan Credit Agreement | Term Loan Facility | After first year | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Loans annual amortization rate (percent) | 1.25% | | | | | | 1.25% | | 1.25% | |
Term Loan Credit Agreement | Bridge Facility | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Line of credit facility, accordion feature, decrease limit | $ 7,400,000,000 | | | | | | $ 7,400,000,000 | | $ 7,400,000,000 | |
Three Year Term Loan | Term Loan Facility | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Debt instrument term | 3 years | | | | | | | | | |
Line of credit facility, maximum borrowing capacity | $ 2,000,000,000 | | | | | | 2,000,000,000 | | 2,000,000,000 | |
Five Year Term Loan | Term Loan Facility | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Debt instrument term | 5 years | | | | | | | | | |
Line of credit facility, maximum borrowing capacity | $ 2,000,000,000 | | | | | | $ 2,000,000,000 | | $ 2,000,000,000 | |
Five Year Term Loan | Term Loan Facility | After second anniversary | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Loans annual amortization rate (percent) | 1.875% | | | | | | 1.875% | | 1.875% | |
Five Year Term Loan | Term Loan Facility | After third anniversary | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Loans annual amortization rate (percent) | 2.50% | | | | | | 2.50% | | 2.50% | |
Hillrom | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Cash consideration | | $ 10,500,000,000 | | | | | | | | |
Business combination consideration transferred | | $ 12,400,000,000 | | | | | | | | |
Acquire businesses, per share, cash paid (in dollars per share) | $ / shares | | $ 156 | | | | | | | | |
Glaxo Smith Kline | Transderm Scop | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Business combination consideration transferred | | | | | $ 84,000,000 | | | | | |
Cash | | | | | 60,000,000 | | | | | |
Contingent consideration | | | | | 30,000,000 | | | | | |
Contingent consideration, fair value | | | | | 24,000,000 | | | | | |
Glaxo Smith Kline | Transderm Scop | Developed Product Rights | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Fair value of asset acquired | | | | | $ 64,000,000 | | | | | |
Weighted-average useful life | | | | | 9 years | | | | | |
Glaxo Smith Kline | Transderm Scop | Developed Product Rights | Measurement Input, Discount Rate | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Discount rate used to measure intangible assets | | | | | 0.225 | | | | | |
Glaxo Smith Kline | Transderm Scop | Customer Relationships | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Fair value of asset acquired | | | | | $ 3,000,000 | | | | | |
Weighted-average useful life | | | | | 7 years | | | | | |
Glaxo Smith Kline | Transderm Scop | Customer Relationships | Measurement Input, Discount Rate | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Discount rate used to measure intangible assets | | | | | 0.155 | | | | | |
Cryo Life | PerClot | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Business combination consideration transferred | | | | $ 53,000,000 | | | | | | |
Cash | | | | 25,000,000 | | | | | | |
Contingent consideration | | | | 36,000,000 | | | | | | |
Contingent consideration, fair value | | | | 28,000,000 | | | | | | |
Cryo Life | PerClot | In Process Research and Development | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Indefinite-lived intangible assets acquired | | | | $ 39,000,000 | | | | | | |
Cryo Life | PerClot | Measurement Input, Discount Rate | In Process Research and Development | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Discount rate used to measure intangible assets | | | | 0.187 | | | | | | |
Cryo Life | PerClot | Developed Product Rights | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Fair value of asset acquired | | | | $ 9,000,000 | | | | | | |
Weighted-average useful life | | | | 10 years | | | | | | |
Cryo Life | PerClot | Developed Product Rights | Measurement Input, Discount Rate | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Discount rate used to measure intangible assets | | | | 0.160 | | | | | | |
Cryo Life | PerClot | Customer Relationships | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Fair value of asset acquired | | | | $ 1,000,000 | | | | | | |
Weighted-average useful life | | | | 10 years | | | | | | |
Cryo Life | PerClot | Customer Relationships | Measurement Input, Discount Rate | | | | | | | | | | |
Business Acquisition [Line Items] | | | | | | | | | | |
Discount rate used to measure intangible assets | | | | 0.150 | | | | | | |