v3.26.1
DEBT AND CREDIT AGREEMENTS - Pre-Separation Funding (Details) - Senior Notes - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 24, 2026
Debt Instrument [Line Items]    
Principal Amount   $ 7,500
3.90% notes due 2028    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 3.90%  
4.00% notes due 2029    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 4.00%  
SOFR plus 0.63% notes due 2029    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 0.63%  
4.30% notes due 2031    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 4.30%  
4.60% notes due 2033    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 4.60%  
4.95% notes due 2036    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 4.95%  
Honeywell Aerospace Inc    
Debt Instrument [Line Items]    
Principal Amount $ 16,000  
Honeywell Aerospace Inc | 3.90% notes due 2028    
Debt Instrument [Line Items]    
Principal Amount $ 1,250  
Debt instrument, interest rate, stated percentage 3.90%  
Honeywell Aerospace Inc | 4.00% notes due 2029    
Debt Instrument [Line Items]    
Principal Amount $ 1,250  
Debt instrument, interest rate, stated percentage 4.00%  
Honeywell Aerospace Inc | SOFR plus 0.63% notes due 2029    
Debt Instrument [Line Items]    
Principal Amount $ 500  
Debt instrument, basis spread on variable rate 0.63%  
Honeywell Aerospace Inc | 4.30% notes due 2031    
Debt Instrument [Line Items]    
Principal Amount $ 2,000  
Debt instrument, interest rate, stated percentage 4.30%  
Honeywell Aerospace Inc | 4.60% notes due 2033    
Debt Instrument [Line Items]    
Principal Amount $ 1,750  
Debt instrument, interest rate, stated percentage 4.60%  
Honeywell Aerospace Inc | 4.95% notes due 2036    
Debt Instrument [Line Items]    
Principal Amount $ 3,250  
Debt instrument, interest rate, stated percentage 4.95%  
Honeywell Aerospace Inc | Notes 5.620% Due 2046    
Debt Instrument [Line Items]    
Principal Amount $ 1,000  
Debt instrument, interest rate, stated percentage 5.62%  
Honeywell Aerospace Inc | Notes 5.730% Due 2056    
Debt Instrument [Line Items]    
Principal Amount $ 3,500  
Debt instrument, interest rate, stated percentage 5.73%  
Honeywell Aerospace Inc | Notes 5.850% Due 2066    
Debt Instrument [Line Items]    
Principal Amount $ 1,500  
Debt instrument, interest rate, stated percentage 5.85%