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Restructuring and Other Costs (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | $ 290 |
Net pre-tax restructuring costs (reversals) | 65 |
Cost of Sales [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 187 |
Selling, General and Administrative Expenses [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 78 |
Other Expense [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 25 |
Current Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 242 |
Restructuring Reserve | 109 |
Net pre-tax restructuring costs (reversals) | 242 |
Utilization and foreign exchange | 133 |
Expected Costs | 354 |
Remaining Costs | 112 |
Current Year Actions [Member] | Cost of Sales [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 149 |
Current Year Actions [Member] | Selling, General and Administrative Expenses [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 67 |
Current Year Actions [Member] | Other Expense [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 26 |
Current Year Actions [Member] | Severance [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 63 |
Net pre-tax restructuring costs (reversals) | 166 |
Utilization and foreign exchange | 103 |
Current Year Actions [Member] | Facility Exit, Lease Termination and Other Costs |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Reserve | 46 |
Net pre-tax restructuring costs (reversals) | 76 |
Utilization and foreign exchange | 30 |
Prior Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 40 |
Restructuring Reserve | 66 | $ 206
Net pre-tax restructuring costs (reversals) | 40 | 326
Utilization and foreign exchange | 180 |
Expected Costs | 408 |
Remaining Costs | 42 |
Prior Year Actions [Member] | Cost of Sales [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 36 |
Prior Year Actions [Member] | Selling, General and Administrative Expenses [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 4 |
Prior Year Actions [Member] | Severance [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 17 |
Restructuring Reserve | 42 | 183
Utilization and foreign exchange | 158 |
Prior Year Actions [Member] | Facility Exit, Lease Termination and Other Costs |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 23 |
Restructuring Reserve | 24 | 23
Utilization and foreign exchange | 22 |
Otis [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 59 |
Otis [Member] | Current Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Net pre-tax restructuring costs (reversals) | 48 |
Expected Costs | 57 |
Remaining Costs | 9 |
Otis [Member] | Prior Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Net pre-tax restructuring costs (reversals) | 14 | 35
Expected Costs | 51 |
Remaining Costs | 2 |
UTC Climate, Controls and Security [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 65 |
UTC Climate, Controls and Security [Member] | Current Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Net pre-tax restructuring costs (reversals) | 45 |
Expected Costs | 87 |
Remaining Costs | 42 |
UTC Climate, Controls and Security [Member] | Prior Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Net pre-tax restructuring costs (reversals) | 24 | 83
Expected Costs | 139 |
Remaining Costs | 32 |
Pratt and Whitney [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 111 |
Pratt and Whitney [Member] | Current Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Net pre-tax restructuring costs (reversals) | 118 |
Expected Costs | 118 |
Remaining Costs | 0 |
Pratt and Whitney [Member] | Prior Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Net pre-tax restructuring costs (reversals) | (20) | 82
Expected Costs | 62 |
Remaining Costs | 0 |
UTC Aerospace Systems [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 49 |
UTC Aerospace Systems [Member] | Current Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Net pre-tax restructuring costs (reversals) | 31 |
Expected Costs | 92 |
Remaining Costs | 61 |
UTC Aerospace Systems [Member] | Prior Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Net pre-tax restructuring costs (reversals) | 16 | 105
Expected Costs | 129 |
Remaining Costs | 8 |
Eliminations and other [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring Charges | 6 |
Eliminations and other [Member] | Prior Year Actions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Net pre-tax restructuring costs (reversals) | 6 | $ 21
Expected Costs | 27 |
Remaining Costs | $ 0 |

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