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PENSION AND OTHER POSTRETIREMENT BENEFITS 3 (Details) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Other Postretirement Benefits [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year $ 0 $ 0    
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 $ 0 $ 0
UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 17,109,000,000 18,985,000,000    
Fair value of plan assets at end of year 18,995,000,000 17,109,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 18,995,000,000 18,985,000,000 18,995,000,000 17,109,000,000
Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 6,481,000,000 7,151,000,000    
Fair value of plan assets at end of year 7,307,000,000 6,481,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 6,481,000,000 6,481,000,000 7,307,000,000 6,481,000,000
Honeywell common stock | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 2,438,000,000      
Fair value of plan assets at end of year 2,857,000,000 2,438,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 2,438,000,000 2,438,000,000 2,857,000,000 2,438,000,000
U.S. equities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 1,365,000,000      
Fair value of plan assets at end of year 1,227,000,000 1,365,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 1,365,000,000 1,365,000,000 1,227,000,000 1,365,000,000
U.S. equities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 429,000,000      
Fair value of plan assets at end of year 149,000,000 429,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 429,000,000 429,000,000 149,000,000 429,000,000
Non-U.S. equities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 753,000,000      
Fair value of plan assets at end of year 0 753,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 753,000,000 753,000,000 0 753,000,000
Non-U.S. equities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 1,356,000,000      
Fair value of plan assets at end of year 1,384,000,000 1,356,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 1,356,000,000 1,356,000,000 1,384,000,000 1,356,000,000
Real estate investment trusts | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 244,000,000      
Fair value of plan assets at end of year 0 244,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 244,000,000 244,000,000 0 244,000,000
Short Term investments [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 877,000,000      
Fair value of plan assets at end of year 1,395,000,000 877,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 877,000,000 877,000,000 1,395,000,000 877,000,000
Short Term investments [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 189,000,000      
Fair value of plan assets at end of year 522,000,000 189,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 189,000,000 189,000,000 522,000,000 189,000,000
Government securities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 993,000,000      
Fair value of plan assets at end of year 1,146,000,000 993,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 993,000,000 993,000,000 1,146,000,000 993,000,000
Government securities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 2,572,000,000      
Fair value of plan assets at end of year 3,006,000,000 2,572,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 2,572,000,000 2,572,000,000 3,006,000,000 2,572,000,000
Corporate bonds | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 6,824,000,000      
Fair value of plan assets at end of year 8,603,000,000 6,824,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 6,824,000,000 6,824,000,000 8,603,000,000 6,824,000,000
Corporate bonds | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 1,468,000,000      
Fair value of plan assets at end of year 1,746,000,000 1,468,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 1,468,000,000 1,468,000,000 1,746,000,000 1,468,000,000
Mortgage/Asset-backed securities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 1,032,000,000      
Fair value of plan assets at end of year 1,023,000,000 1,032,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 1,032,000,000 1,032,000,000 1,023,000,000 1,032,000,000
Mortgage/Asset-backed securities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 60,000,000      
Fair value of plan assets at end of year 84,000,000 60,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 60,000,000 60,000,000 84,000,000 60,000,000
Insurance contracts | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 8,000,000      
Fair value of plan assets at end of year 8,000,000 8,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 8,000,000 8,000,000 8,000,000 8,000,000
Insurance contracts | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 137,000,000      
Fair value of plan assets at end of year 120,000,000 137,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 137,000,000 137,000,000 120,000,000 137,000,000
Private Funds [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 46,000,000      
Fair value of plan assets at end of year 69,000,000 46,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 46,000,000 46,000,000 69,000,000 46,000,000
Real Estate Funds - Global [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 144,000,000      
Fair value of plan assets at end of year 150,000,000 144,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 144,000,000 144,000,000 150,000,000 144,000,000
Direct Private Investments [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 829,000,000      
Fair value of plan assets at end of year 950,000,000 829,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 829,000,000 829,000,000 950,000,000 829,000,000
Real Estate Properties [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 657,000,000      
Fair value of plan assets at end of year 619,000,000 657,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 657,000,000 657,000,000 619,000,000 657,000,000
Total plan assets, excluding NAV assets [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 16,020,000,000      
Fair value of plan assets at end of year 17,828,000,000 16,020,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 16,020,000,000 16,020,000,000 17,828,000,000 16,020,000,000
Total plan assets, excluding NAV assets [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 6,401,000,000      
Fair value of plan assets at end of year 7,230,000,000 6,401,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 6,401,000,000 6,401,000,000 7,230,000,000 6,401,000,000
NAV assets, Private funds [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 931,000,000      
Fair value of plan assets at end of year 1,019,000,000 931,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 931,000,000 931,000,000 1,019,000,000 931,000,000
NAV assets, Private funds [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 26,000,000      
Fair value of plan assets at end of year 21,000,000 26,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 26,000,000 26,000,000 21,000,000 26,000,000
NAV assets, Real estate funds [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 56,000,000      
Fair value of plan assets at end of year 42,000,000 56,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 56,000,000 56,000,000 42,000,000 56,000,000
NAV assets, Real estate funds [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 54,000,000      
Fair value of plan assets at end of year 56,000,000 54,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 54,000,000 54,000,000 56,000,000 54,000,000
NAV assets, Hedge funds [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 1,000,000      
Fair value of plan assets at end of year 0 1,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 1,000,000 1,000,000 0 1,000,000
NAV Assets Comingled Funds [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 101,000,000      
Fair value of plan assets at end of year 106,000,000 101,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 101,000,000 101,000,000 $ 106,000,000 101,000,000
Equity Securities [Member] | Minimum [Member]        
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items]        
Target allocations percentage     25.00%  
Equity Securities [Member] | Maximum [Member]        
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items]        
Target allocations percentage     40.00%  
Fixed Income Securities [Member] | Minimum [Member]        
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items]        
Target allocations percentage     55.00%  
Fixed Income Securities [Member] | Maximum [Member]        
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items]        
Target allocations percentage     70.00%  
Real Estate [Member] | Minimum [Member]        
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items]        
Target allocations percentage     5.00%  
Real Estate [Member] | Maximum [Member]        
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items]        
Target allocations percentage     10.00%  
Other than Securities Investment [Member] | Minimum [Member]        
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items]        
Target allocations percentage     10.00%  
Other than Securities Investment [Member] | Maximum [Member]        
Defined Benefit Plan Plans With Benefit Obligations In Excess of Plan Assets Paragraph Details [Line Items]        
Target allocations percentage     20.00%  
Fair Value, Inputs, Level 1 [Member] | Honeywell common stock | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 2,438,000,000      
Fair value of plan assets at end of year 2,857,000,000 2,438,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 2,438,000,000 2,438,000,000 $ 2,857,000,000 2,438,000,000
Fair Value, Inputs, Level 1 [Member] | U.S. equities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 1,365,000,000      
Fair value of plan assets at end of year 1,227,000,000 1,365,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 1,365,000,000 1,365,000,000 1,227,000,000 1,365,000,000
Fair Value, Inputs, Level 1 [Member] | U.S. equities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 297,000,000      
Fair value of plan assets at end of year 0 297,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 297,000,000 297,000,000 0 297,000,000
Fair Value, Inputs, Level 1 [Member] | Non-U.S. equities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 753,000,000      
Fair value of plan assets at end of year 0 753,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 753,000,000 753,000,000 0 753,000,000
Fair Value, Inputs, Level 1 [Member] | Non-U.S. equities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 44,000,000      
Fair value of plan assets at end of year 54,000,000 44,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 44,000,000 44,000,000 54,000,000 44,000,000
Fair Value, Inputs, Level 1 [Member] | Real estate investment trusts | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 244,000,000      
Fair value of plan assets at end of year 0 244,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 244,000,000 244,000,000 0 244,000,000
Fair Value, Inputs, Level 1 [Member] | Short Term investments [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 877,000,000      
Fair value of plan assets at end of year 1,395,000,000 877,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 877,000,000 877,000,000 1,395,000,000 877,000,000
Fair Value, Inputs, Level 1 [Member] | Short Term investments [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 189,000,000      
Fair value of plan assets at end of year 522,000,000 189,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 189,000,000 189,000,000 522,000,000 189,000,000
Fair Value, Inputs, Level 1 [Member] | Government securities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Government securities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Corporate bonds | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Corporate bonds | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Mortgage/Asset-backed securities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Mortgage/Asset-backed securities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Insurance contracts | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Insurance contracts | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Private Funds [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Real Estate Funds - Global [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Direct Private Investments [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Real Estate Properties [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 1 [Member] | Total plan assets, excluding NAV assets [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 5,677,000,000      
Fair value of plan assets at end of year 5,479,000,000 5,677,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 5,677,000,000 5,677,000,000 5,479,000,000 5,677,000,000
Fair Value, Inputs, Level 1 [Member] | Total plan assets, excluding NAV assets [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 530,000,000      
Fair value of plan assets at end of year 576,000,000 530,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 530,000,000 530,000,000 576,000,000 530,000,000
Fair Value, Inputs, Level 2 [Member] | Honeywell common stock | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 2 [Member] | U.S. equities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 2 [Member] | U.S. equities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 132,000,000      
Fair value of plan assets at end of year 149,000,000 132,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 132,000,000 132,000,000 149,000,000 132,000,000
Fair Value, Inputs, Level 2 [Member] | Non-U.S. equities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 2 [Member] | Non-U.S. equities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 1,312,000,000      
Fair value of plan assets at end of year 1,330,000,000 1,312,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 1,312,000,000 1,312,000,000 1,330,000,000 1,312,000,000
Fair Value, Inputs, Level 2 [Member] | Real estate investment trusts | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 2 [Member] | Short Term investments [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 2 [Member] | Short Term investments [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 2 [Member] | Government securities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 993,000,000      
Fair value of plan assets at end of year 1,146,000,000 993,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 993,000,000 993,000,000 1,146,000,000 993,000,000
Fair Value, Inputs, Level 2 [Member] | Government securities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 2,572,000,000      
Fair value of plan assets at end of year 3,006,000,000 2,572,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 2,572,000,000 2,572,000,000 3,006,000,000 2,572,000,000
Fair Value, Inputs, Level 2 [Member] | Corporate bonds | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 6,824,000,000      
Fair value of plan assets at end of year 8,603,000,000 6,824,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 6,824,000,000 6,824,000,000 8,603,000,000 6,824,000,000
Fair Value, Inputs, Level 2 [Member] | Corporate bonds | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 1,468,000,000      
Fair value of plan assets at end of year 1,746,000,000 1,468,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 1,468,000,000 1,468,000,000 1,746,000,000 1,468,000,000
Fair Value, Inputs, Level 2 [Member] | Mortgage/Asset-backed securities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 1,032,000,000      
Fair value of plan assets at end of year 1,023,000,000 1,032,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 1,032,000,000 1,032,000,000 1,023,000,000 1,032,000,000
Fair Value, Inputs, Level 2 [Member] | Mortgage/Asset-backed securities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 60,000,000      
Fair value of plan assets at end of year 84,000,000 60,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 60,000,000 60,000,000 84,000,000 60,000,000
Fair Value, Inputs, Level 2 [Member] | Insurance contracts | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 8,000,000      
Fair value of plan assets at end of year 8,000,000 8,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 8,000,000 8,000,000 8,000,000 8,000,000
Fair Value, Inputs, Level 2 [Member] | Insurance contracts | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 137,000,000      
Fair value of plan assets at end of year 120,000,000 137,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 137,000,000 137,000,000 120,000,000 137,000,000
Fair Value, Inputs, Level 2 [Member] | Private Funds [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 12,000,000      
Fair value of plan assets at end of year 35,000,000 12,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 12,000,000 12,000,000 35,000,000 12,000,000
Fair Value, Inputs, Level 2 [Member] | Real Estate Funds - Global [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 2 [Member] | Direct Private Investments [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 2 [Member] | Real Estate Properties [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 2 [Member] | Total plan assets, excluding NAV assets [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 8,857,000,000      
Fair value of plan assets at end of year 10,780,000,000 8,857,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 8,857,000,000 8,857,000,000 10,780,000,000 8,857,000,000
Fair Value, Inputs, Level 2 [Member] | Total plan assets, excluding NAV assets [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 5,693,000,000      
Fair value of plan assets at end of year 6,470,000,000 5,693,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 5,693,000,000 5,693,000,000 6,470,000,000 5,693,000,000
Fair Value, Inputs, Level 3 [Member] | Honeywell common stock | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | U.S. equities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | U.S. equities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Non-U.S. equities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Non-U.S. equities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Real estate investment trusts | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Short Term investments [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Short Term investments [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Government securities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Government securities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Corporate bonds | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Corporate bonds | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Mortgage/Asset-backed securities | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Mortgage/Asset-backed securities | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Insurance contracts | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Insurance contracts | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 0      
Fair value of plan assets at end of year 0 0    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 0 0 0 0
Fair Value, Inputs, Level 3 [Member] | Private Funds [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 34,000,000 31,000,000    
Relating to assets still held at year-end     0 1,000,000
Relating to assets sold during the year 0 0    
Purchases 0 2,000,000    
Sales and settlements 0 0    
Fair value of plan assets at end of year 34,000,000 34,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 34,000,000 34,000,000 34,000,000 34,000,000
Fair Value, Inputs, Level 3 [Member] | Real Estate Funds - Global [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 144,000,000 149,000,000    
Relating to assets still held at year-end     7,000,000 (4,000,000)
Relating to assets sold during the year 1,000,000 0    
Purchases 0 0    
Sales and settlements (2,000,000) (1,000,000)    
Fair value of plan assets at end of year 150,000,000 144,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 150,000,000 144,000,000 150,000,000 144,000,000
Fair Value, Inputs, Level 3 [Member] | Direct Private Investments [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 829,000,000 752,000,000    
Relating to assets still held at year-end     15,000,000 36,000,000
Relating to assets sold during the year 89,000,000 65,000,000    
Purchases 216,000,000 95,000,000    
Sales and settlements (199,000,000) (119,000,000)    
Fair value of plan assets at end of year 950,000,000 829,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 829,000,000 829,000,000 950,000,000 829,000,000
Fair Value, Inputs, Level 3 [Member] | Real Estate Properties [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 657,000,000 597,000,000    
Relating to assets still held at year-end     40,000,000 33,000,000
Relating to assets sold during the year (23,000,000) 2,000,000    
Purchases 48,000,000 47,000,000    
Sales and settlements (103,000,000) (22,000,000)    
Fair value of plan assets at end of year 619,000,000 657,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 657,000,000 597,000,000 619,000,000 657,000,000
Fair Value, Inputs, Level 3 [Member] | Total plan assets, excluding NAV assets [Member] | UNITED STATES        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 1,486,000,000      
Fair value of plan assets at end of year 1,569,000,000 1,486,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets 1,486,000,000 1,486,000,000 1,569,000,000 1,486,000,000
Fair Value, Inputs, Level 3 [Member] | Total plan assets, excluding NAV assets [Member] | Foreign Plan [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of plan assets at beginning of year 178,000,000      
Fair value of plan assets at end of year 184,000,000 178,000,000    
Defined Benefit Plan Disclosure [Abstract]        
Fair value of pension plan assets $ 178,000,000 $ 178,000,000 $ 184,000,000 $ 178,000,000