FINANCING ARRANGEMENTS - Narrative (Details) € in Millions		1 Months Ended		12 Months Ended
FINANCING ARRANGEMENTS - Narrative (Details) € in Millions	Feb. 13, 2024 USD ($)	Nov. 30, 2025 USD ($)	Feb. 29, 2024 USD ($)	Dec. 31, 2030 USD ($)	Dec. 31, 2029 USD ($)	Dec. 31, 2028 USD ($)	Dec. 31, 2027 USD ($)	Dec. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Nov. 30, 2025 EUR (€)	Jan. 31, 2025 USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of short-term debt obligations									$ 0	$ 2,987,000,000	$ 0
Long-term debt, fair value									41,500,000,000	45,300,000,000
Principal Value									44,323,000,000	48,937,000,000
Unsecured senior notes, principal amount											4,500,000,000
Repayments of notes payable									1,900,000,000	2,900,000,000	3,900,000,000
Interest payments									2,100,000,000	1,800,000,000	$ 1,200,000,000
Long-term debt, maturity, 2025									2,000,000,000
Long-term debt, maturity, 2026									2,000,000,000
Long-term debt, maturity, 2027									544,000,000
Long-term debt, maturity, 2028									2,200,000,000
Long-term debt, maturity, 2029									2,100,000,000
Available financial guarantees									1,300,000,000
Forecast
Debt Instrument [Line Items]
Interest payment				$ 1,600,000,000	$ 1,600,000,000	$ 1,700,000,000	$ 1,700,000,000	$ 1,800,000,000
Unsecured Debt
Debt Instrument [Line Items]
Principal Value \| €												€ 5,000
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Borrowings outstanding									$ 0	0
$5 Billion Maximum Borrowing Capacity
Debt Instrument [Line Items]
Renewal period									1 year
2024 Senior Unsecured Notes
Debt Instrument [Line Items]
Principal Value										13,000,000,000
Proceeds from debt, net of issuance costs										12,900,000,000
$5.0 Billion Maximum Borrowing Capacity \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, term (in years)									5 years
Line of credit facility, maximum borrowing capacity									$ 5,000,000,000
3.200% Notes due 2026
Debt Instrument [Line Items]
Principal Value									$ 1,220,000,000	1,750,000,000
Interest rates									3.20%
Registered Public Offering \| Unsecured Debt
Debt Instrument [Line Items]
Principal Value \| €												€ 5,000
Proceeds from debt, net of issuance costs		$ 5,700,000,000
Commercial paper \| Commercial Paper Program
Debt Instrument [Line Items]
Commercial paper, maximum aggregate capacity										$ 7,000,000,000			$ 5,000,000,000
Debt instrument, term									365 days
Line of Credit \| 2024 Senior Unsecured Notes \| Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, term			364 days
Principal Value			$ 10,000,000,000
Line of Credit \| $2.0 Billion Maximum Borrowing Capacity \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, term	364 days
Line of credit facility, maximum borrowing capacity	$ 2,000,000,000

BRISTOL MYERS SQUIBB CO 10-K