| Schedule of Restructuring and Related Costs [Text Block] |
| (Dollars in millions) | | | | | Otis | | $ | 105 | | UTC Climate, Controls & Security | | | 98 | | Pratt & Whitney | | | 57 | | UTC Aerospace Systems | | | 40 | | Sikorsky | | | 18 | | Eliminations and other | | | 14 | | Restructuring costs recorded within continuing operations | | | 332 | | Restructuring costs recorded within discontinued operations | | | 28 | | Total | | $ | 360 |
| (Dollars in millions) | | Severance | | Asset Write-Downs | | Facility Exit, Lease Termination and Other Costs | | Total | | Expected costs | | $ | 321 | | $ | 14 | | $ | 150 | | $ | 485 | | Costs incurred - quarter ended March 31, 2012 | | | (96) | | | (12) | | | (8) | | | (116) | | Costs incurred - quarter ended June 30, 2012 | | | (59) | | | (1) | | | (11) | | | (71) | | Costs incurred - quarter ended September 30, 2012 | | | (109) | | | (1) | | | (13) | | | (123) | | Balance at September 30, 2012 | | $ | 57 | | $ | - | | $ | 118 | | $ | 175 |
| | | | | Costs Incurred | | Costs Incurred | | Costs Incurred | | Remaining | | | | | | Quarter Ended | | Quarter Ended | | Quarter Ended | | Costs at | | (Dollars in millions) | | Expected Costs | | March 31, 2012 | | June 30, 2012 | | September 30, 2012 | | September 30, 2012 | | Otis | | $ | 113 | | $ | (23) | | $ | (31) | | $ | (38) | | $ | 21 | | UTC Climate, Controls & Security | | | 122 | | | (25) | | | (24) | | | (24) | | | 49 | | Pratt & Whitney | | | 74 | | | (34) | | | (16) | | | (2) | | | 22 | | UTC Aerospace Systems | | | 84 | | | (1) | | | (2) | | | (38) | | | 43 | | Sikorsky | | | 51 | | | - | | | - | | | (11) | | | 40 | | Eliminations and other | | | 14 | | | (6) | | | 2 | | | (10) | | | - | | Discontinued operations | | | 27 | | | (27) | | | - | | | - | | | - | | Total | | $ | 485 | | $ | (116) | | $ | (71) | | $ | (123) | | $ | 175 |
| (Dollars in millions) | | Severance | | Asset Write-Downs | | Facility Exit, Lease Termination and Other Costs | | Total | | Expected costs | | $ | 304 | | $ | 4 | | $ | 68 | | $ | 376 | | Costs incurred through December 31, 2011 | | | (259) | | | (4) | | | (23) | | | (286) | | Costs incurred - quarter ended March 31, 2012 | | | (10) | | | - | | | (10) | | | (20) | | Costs incurred - quarter ended June 30, 2012 | | | (18) | | | - | | | (3) | | | (21) | | Costs incurred - quarter ended September 30, 2012 | | | (4) | | | - | | | (4) | | | (8) | | Remaining costs at September 30, 2012 | | $ | 13 | | $ | - | | $ | 28 | | $ | 41 |
| | | | | | Costs Incurred | | Costs Incurred | | Costs Incurred | | Costs Incurred | | Remaining | | | | | | | through | | Quarter Ended | | Quarter Ended | | Quarter Ended | | Costs at | | (Dollars in millions) | | Expected Costs | | December 31, 2011 | | March 31, 2012 | | June 30, 2012 | | September 30, 2012 | | September 30, 2012 | | Otis | | $ | 101 | | $ | (76) | | $ | (6) | | $ | (4) | | $ | (4) | | $ | 11 | | UTC Climate, Controls & Security | | | 121 | | | (93) | | | (9) | | | (13) | | | (2) | | | 4 | | Pratt & Whitney | | | 47 | | | (37) | | | (2) | | | (1) | | | (1) | | | 6 | | UTC Aerospace Systems | | | 8 | | | (8) | | | - | | | - | | | - | | | - | | Sikorsky | | | 75 | | | (51) | | | (3) | | | (2) | | | (1) | | | 18 | | Discontinued operations | | | 24 | | | (21) | | | - | | | (1) | | | - | | | 2 | | Total | | $ | 376 | | $ | (286) | | $ | (20) | | $ | (21) | | $ | (8) | | $ | 41 |
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| Schedule of Restructuring Reserve by Type of Cost [Text Block] |
| (Dollars in millions) | | Severance | | Asset
Write-Downs | | Facility Exit, Lease Termination and Other Costs | | Total | | Restructuring accruals at June 30, 2012 | | $ | 93 | | $ | - | | $ | 10 | | $ | 103 | | Restructuring accruals assumed from Goodrich | | | 19 | | | - | | | - | | | 19 | | Net pre-tax restructuring costs | | | 109 | | | 1 | | | 13 | | | 123 | | Utilization and foreign exchange | | | (58) | | | (1) | | | (7) | | | (66) | | Balance at September 30, 2012 | | $ | 163 | | $ | - | | $ | 16 | | $ | 179 |
| (Dollars in millions) | | Severance | | Asset
Write-Downs | | Facility Exit, Lease Termination and Other Costs | | Total | | Restructuring accruals at June 30, 2012 | | $ | 70 | | $ | - | | $ | 12 | | $ | 82 | | Net pre-tax restructuring costs | | | 4 | | | - | | | 4 | | | 8 | | Utilization and foreign exchange | | | (19) | | | - | | | (8) | | | (27) | | Balance at September 30, 2012 | | $ | 55 | | $ | - | | $ | 8 | | $ | 63 |
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