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Subsequent Events (Details) € in Millions |  | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Apr. 03, 2020 shares | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 EUR (€) | Dec. 31, 2018 USD ($) | Jun. 30, 2020 EUR (€)
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net pre-tax restructuring costs (benefit) |  |  |  |  |  |  |  | $ 245,000,000 |  |  |  |  |
Aggregate Line of Credit Facility Maximum Borrowing Capacity |  |  |  |  |  |  |  | $ 10,350,000,000 |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  |  |  |  |  |  | $ 11,000,000,000.0 |  |
Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net pre-tax restructuring costs (benefit) |  |  |  |  |  |  | $ 685,000,000 |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  | $ 3,200,000,000 |  |  |  |  |  |  |  |  |
Aggregate Line of Credit Facility Maximum Borrowing Capacity |  |  |  | 7,000,000,000.0 |  | $ 7,000,000,000.0 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | 19,300,000,000 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | 15,174,000,000 |  |  |  |  |  |  |
Extinguishment of Debt, Amount |  |  |  |  |  |  | $ 703,000,000 |  |  |  |  |  |
Debt Exchanged |  |  |  | $ 8,200,000,000 |  | $ 8,200,000,000 |  |  |  |  |  |  |
Collins Aerospace Systems [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  | $ 2,300,000,000 |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business |  |  | 580,000,000 |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business, Net of Tax |  |  | $ 253,000,000 |  |  |  |  |  |  |  |  |  |
Otis [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of common stock distributed in the Distribution | shares |  | 433,079,455 |  |  |  |  |  |  |  |  |  |  |
Otis [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of common stock distributed in the Distribution | shares |  | 433,079,455 |  |  |  |  |  |  |  |  |  |  |
Carrier [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of common stock distributed in the Distribution | shares |  | 866,158,910 |  |  |  |  |  |  |  |  |  |  |
Raytheon Company [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition UTC stock payable shares | shares |  | 2.3348 |  |  |  |  |  |  |  |  |  |  |
Notes 2.250% Due 2030 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.25% |  | 2.25% |  |  |  |  |  |  | 2.25%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2030 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |
Notes 3.125% Due 2050 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.125% |  | 3.125% |  |  |  |  |  |  | 3.125%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2050 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |
Otis 3-Year Term Loan due 2023 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2023 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |
Carrier 3-Year Term Loan due 2023 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2023 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 1,750,000,000 |  |  |  |  |  |  |
Notes 1.923% Due 2023 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 1.923% |  | 1.923% |  |  |  |  |  |  | 1.923%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2023 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |
Libor plus 0.45% floating rates due 2023 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 0.45% |  | 0.45% |  |  |  |  |  |  | 0.45%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2023 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |
Notes 2.056% Due 2025 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.056% |  | 2.056% |  |  |  |  |  |  | 2.056%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2025 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 1,300,000,000 |  |  |  |  |  |  |
Notes 2.242% Due 2025 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.242% |  | 2.242% |  |  |  |  |  |  | 2.242%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2025 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 2,000,000,000 |  |  |  |  |  |  |
Notes 2.293% Due 2027 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.293% |  | 2.293% |  |  |  |  |  |  | 2.293%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2027 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |
Notes 2.493% Due 2027 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.493% |  | 2.493% |  |  |  |  |  |  | 2.493%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2027 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 1,250,000,000 |  |  |  |  |  |  |
Notes 2.565% Due 2030 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.565% |  | 2.565% |  |  |  |  |  |  | 2.565%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2030 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 1,500,000,000 |  |  |  |  |  |  |
Notes 2.722% Due 2030 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.722% |  | 2.722% |  |  |  |  |  |  | 2.722%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2030 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 2,000,000,000 |  |  |  |  |  |  |
Notes 3.112% Due 2040 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.112% |  | 3.112% |  |  |  |  |  |  | 3.112%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2040 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 750,000,000 |  |  |  |  |  |  |
Notes 3.377% Due 2040 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.377% |  | 3.377% |  |  |  |  |  |  | 3.377%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2040 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 1,500,000,000 |  |  |  |  |  |  |
Notes 3.362% Due 2050 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.362% |  | 3.362% |  |  |  |  |  |  | 3.362%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2050 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 750,000,000 |  |  |  |  |  |  |
Notes 3.577% Due 2050 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.577% |  | 3.577% |  |  |  |  |  |  | 3.577%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2050 |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  | $ 2,000,000,000 |  |  |  |  |  |  |
Notes 3.650% Due 2023 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 3.65% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2023 |  | 2023 |  |  |
Proceeds from Issuance of Debt | [1] |  |  |  |  |  |  | $ 2,250,000,000 |  |  |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 2,250,000,000 |  |  | 2,250,000,000 |  |
Notes 3.650% Due 2023 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.65% |  | 3.65% |  |  |  |  |  |  | 3.65%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2023 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  | $ 1,669,000,000 | $ 410,000,000 |  |  |  |  |  |  |
EURIBOR plus 0.20% floating rate notes due 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 0.20% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2020 |  | 2020 |  |  |
Proceeds from Issuance of Debt | € | [3] |  |  |  |  |  |  |  |  | € 750 |  |  |
Debt Instrument, Carrying Amount | [4] |  |  |  |  |  |  | $ 831,000,000 |  |  | 858,000,000 |  |
EURIBOR plus 0.20% floating rate notes due 2020 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 0.20% |  | 0.20% |  |  |  |  |  |  | 0.20%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2020 |  |  |  |  |  |  |
Debt Instrument, Carrying Amount | € |  |  |  |  |  |  |  |  |  |  |  |  | € 750
Repayments of Debt |  |  |  |  |  | $ 817,000,000 |  |  |  |  |  |  |
Notes 4.500% Due 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 4.50% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2020 |  | 2020 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 1,250,000,000 |  |  | 1,250,000,000 |  |
Notes 4.500% Due 2020 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 4.50% |  | 4.50% |  |  |  |  |  |  | 4.50%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2020 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | $ 1,250,000,000 |  |  |  |  |  |  |
Notes 1.125% Due 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 1.125% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2021 |  | 2021 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 1,053,000,000 |  |  | 1,088,000,000 |  |
Notes 1.125% Due 2021 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 1.125% |  | 1.125% |  |  |  |  |  |  | 1.125%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2021 |  |  |  |  |  |  |
Debt Instrument, Carrying Amount | € |  |  |  |  |  |  |  |  |  |  |  |  | € 950
Repayments of Debt |  |  |  |  |  | $ 1,082,000,000 |  |  |  |  |  |  |
Notes 1.250% due 2023 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 1.25% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2023 |  | 2023 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 831,000,000 |  |  | 858,000,000 |  |
Notes 1.250% due 2023 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 1.25% |  | 1.25% |  |  |  |  |  |  | 1.25%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2023 |  |  |  |  |  |  |
Debt Instrument, Carrying Amount | € |  |  |  |  |  |  |  |  |  |  |  |  | € 750
Repayments of Debt |  |  |  |  |  | $ 836,000,000 |  |  |  |  |  |  |
Notes 1.150% Due 2024 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 1.15% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2024 |  | 2024 |  |  |
Proceeds from Issuance of Debt | € | [3] |  |  |  |  |  |  |  |  | € 750 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 831,000,000 |  |  | 858,000,000 |  |
Notes 1.150% Due 2024 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 1.15% |  | 1.15% |  |  |  |  |  |  | 1.15%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2024 |  |  |  |  |  |  |
Debt Instrument, Carrying Amount | € |  |  |  |  |  |  |  |  |  |  |  |  | € 750
Repayments of Debt |  |  |  |  |  | $ 841,000,000 |  |  |  |  |  |  |
Notes 1.875% Due 2026 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 1.875% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2026 |  | 2026 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 554,000,000 |  |  | 573,000,000 |  |
Notes 1.875% Due 2026 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 1.875% |  | 1.875% |  |  |  |  |  |  | 1.875%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2026 |  |  |  |  |  |  |
Debt Instrument, Carrying Amount | € |  |  |  |  |  |  |  |  |  |  |  |  | € 500
Repayments of Debt |  |  |  |  |  | $ 567,000,000 |  |  |  |  |  |  |
Notes 1.900% Due 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 1.90% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2020 |  | 2020 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 1,000,000,000 |  |  | 1,000,000,000 |  |
Notes 1.900% Due 2020 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 1.90% |  | 1.90% |  |  |  |  |  |  | 1.90%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2020 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |
Notes 3.350% due 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 3.35% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2021 |  | 2021 |  |  |
Proceeds from Issuance of Debt | [1] |  |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 1,000,000,000 |  |  | 1,000,000,000 |  |
Notes 3.350% due 2021 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.35% |  | 3.35% |  |  |  |  |  |  | 3.35%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2021 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | $ 1,000,000,000 |  |  |  |  |  |  |
LIBOR plus 0.650% floating rate notes due 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 0.65% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2021 |  | 2021 |  |  |
Proceeds from Issuance of Debt | [1] |  |  |  |  |  |  | $ 750,000,000 |  |  |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 750,000,000 | [5] |  | 750,000,000 | [6] |
LIBOR plus 0.650% floating rate notes due 2021 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 0.65% |  | 0.65% |  |  |  |  |  |  | 0.65%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2021 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | $ 750,000,000 |  |  |  |  |  |  |
Notes 1.950% Due 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 1.95% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2021 |  | 2021 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 750,000,000 |  |  | 750,000,000 |  |
Notes 1.950% Due 2021 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 1.95% |  | 1.95% |  |  |  |  |  |  | 1.95%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2021 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | $ 750,000,000 |  |  |  |  |  |  |
Notes 2.300% Due 2022 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 2.30% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2022 |  | 2022 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 500,000,000 |  |  | 500,000,000 |  |
Notes 2.300% Due 2022 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.30% |  | 2.30% |  |  |  |  |  |  | 2.30%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2022 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |
Notes 3.100% Due 2022 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 3.10% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2022 |  | 2022 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 2,300,000,000 |  |  | 2,300,000,000 |  |
Notes 3.100% Due 2022 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 3.10% |  | 3.10% |  |  |  |  |  |  | 3.10%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2022 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | $ 2,300,000,000 |  |  |  |  |  |  |
Notes 2.800% Due 2024 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 2.80% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2024 |  | 2024 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 800,000,000 |  |  | 800,000,000 |  |
Notes 2.800% Due 2024 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.80% |  | 2.80% |  |  |  |  |  |  | 2.80%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2024 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | $ 800,000,000 |  |  |  |  |  |  |
Notes 4.875% Due 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 4.875% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2020 |  | 2020 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 171,000,000 |  |  | 171,000,000 |  |
Notes 4.875% Due 2020 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 4.875% |  | 4.875% |  |  |  |  |  |  | 4.875%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2020 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | $ 171,000,000 |  |  |  |  |  |  |
Notes 2.650% Due 2026 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 2.65% |  |  |  |  |
Debt Instrument, Maturity Year Date |  |  |  |  |  |  |  | 2026 |  | 2026 |  |  |
Debt Instrument, Carrying Amount | [2] |  |  |  |  |  |  | $ 1,150,000,000 |  |  | $ 1,150,000,000 |  |
Notes 2.650% Due 2026 [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.65% |  | 2.65% |  |  |  |  |  |  | 2.65%
Debt Instrument, Maturity Year Date |  |  |  |  |  | 2026 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  | $ 431,000,000 |  |  |  |  |  |  |
Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Termination of Credit Agreement |  |  |  |  |  |  |  | 4,000,000,000.0 |  |  |  |  |
$2.0B revolving credit agreement [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Termination of Credit Agreement |  |  |  |  |  |  |  | $ 2,000,000,000.0 |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | $ 2,000,000,000.0 |  | 2,000,000,000.0 |  |  |  |  |  |  |
1.75B Credit Agreement - Carrier [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Termination of Credit Agreement |  |  |  | 1,750,000,000 |  | 1,750,000,000 |  |  |  |  |  |  |
Line of Credit - Otis [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Termination of Credit Agreement |  |  |  | 1,000,000,000.0 |  | 1,000,000,000.0 |  |  |  |  |  |  |
Borrowings [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | 2,100,000,000 |  | 2,100,000,000 |  |  |  |  |  |  |
Revolving Credit Agreement, Current [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Termination of Credit Agreement |  |  |  | 2,200,000,000 |  | 2,200,000,000 |  |  |  |  |  |  |
Multicurrency Revolving Credit Agreement [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Termination of Credit Agreement |  |  |  | 2,150,000,000 |  | 2,150,000,000 |  |  |  |  |  |  |
$500M Term Loan Credit Agreement [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Termination of Credit Agreement |  |  |  | 500,000,000 |  | 500,000,000 |  |  |  |  |  |  |
1.0B Credit Agreement [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | 1,000,000,000.0 |  | 1,000,000,000.0 |  |  |  |  |  |  |
Revolving Credit Agreement [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | $ 5,000,000,000.0 |  | $ 5,000,000,000.0 |  |  |  |  |  |  |
[1] | (1) The net proceeds received from these debt issuances were used to partially finance the cash consideration portion of the purchase price for Rockwell Collins and fees, expenses and other amounts related to the acquisition of Rockwell Collins.
[2] | We may redeem these notes at our option pursuant to their terms.
[3] | (3) The net proceeds received from these debt issuances were used for general corporate purposes.
[4] | The three-month EURIBOR rate as of December 31, 2019 was approximately (0.383)%. The notes may be redeemed at our option in whole, but not in part, at any time in the event of certain developments affecting U.S. taxation.
[5] | The three-month LIBOR rate as of December 31, 2019 was approximately 1.908%.
[6] | The three-month LIBOR rate as of December 31, 2019 was approximately 1.908%.

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