Borrowings and Lines of Credit Borrowings and lines of Credit (Current Year Actions) (Details) € in Millions, $ in Millions			3 Months Ended		12 Months Ended
		Mar. 20, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)
Debt Instrument [Line Items]
Proceeds from Issuance of Debt			$ 17,300
Repayments of Debt			$ 13,947	$ 2,702
Average Years of Maturity of Long Term Debt			14 years
Average interest expense rate			3.60%	3.60%
Notes 3.350% Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[1],[2]		3.35%
Debt Instrument, Maturity Date, Description	[1],[2]		2021
Repayments of Debt	[1],[2]		$ 1,000
Notes 3.650% Due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[1],[2],[3]		3.65%
Debt Instrument, Maturity Date, Description	[1],[2],[3]		2023
Repayments of Debt	[1],[2]	$ 1,669
Notes 3.950% Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[3]		3.95%
Debt Instrument, Maturity Date, Description	[3]		2025
Notes 4.125% Due 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[3]		4.125%
Debt Instrument, Maturity Date, Description	[3]		2028
Notes 4.450% Due 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[3]		4.45%
Debt Instrument, Maturity Date, Description	[3]		2038
Notes 4.625% Due 2048 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[3]		4.625%
Debt Instrument, Maturity Date, Description	[3]		2048
LIBOR plus 0.650% floating rate notes due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[1],[2],[4]		0.65%
Debt Instrument, Maturity Date, Description	[1],[2],[4]		2021
Repayments of Debt	[1],[2]		$ 750
Notes 1.150% Due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[1],[2]		1.15%
Debt Instrument, Maturity Date, Description	[1],[2]		2024
Repayments of Debt	[1],[2]		$ 841
Notes 2.150% Due 2030 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[3]		2.15%
Debt Instrument, Maturity Date, Description	[3]		2030
EURIBOR plus 0.20% floating rate notes due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[5]		0.20%
Debt Instrument, Maturity Date, Description	[5]		2020
EURIBOR plus 0.15% floating rate notes due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			0.15%
Debt Instrument, Maturity Date, Description			2019
Repayment of Debt, Date					Nov. 13, 2019	Nov. 13, 2019
Repayments of Debt | €						€ 831
LIBOR plus 0.350% floating rate notes due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			0.35%
Debt Instrument, Maturity Date, Description			2019
Repayments of Debt					$ 350
Notes 1.500% Due 2019 [Member]
Debt Instrument [Line Items]
Repayments of Debt					$ 650
Notes 2.650% Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[1],[2],[3]		2.65%
Debt Instrument, Maturity Date, Description	[1],[2],[3]		2026
Repayments of Debt	[1],[2]		$ 431
Notes 4.875% Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[1],[2]		4.875%
Debt Instrument, Maturity Date, Description	[1],[2]		2020
Repayments of Debt	[1],[2]		$ 171
Notes 1.923% Due 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		1.923%
Debt Instrument, Maturity Date, Description	[6],[7]		2023
Proceeds from Issuance of Debt	[6]		$ 500
Notes 2.242% Due 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		2.242%
Debt Instrument, Maturity Date, Description	[6],[7]		2025
Proceeds from Issuance of Debt	[6]		$ 2,000
Notes 2.493% Due 2027
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		2.493%
Debt Instrument, Maturity Date, Description	[6],[7]		2027
Proceeds from Issuance of Debt	[6]		$ 1,250
Notes 2.722% Due 2030
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		2.722%
Debt Instrument, Maturity Date, Description	[6],[7]		2030
Proceeds from Issuance of Debt	[6]		$ 2,000
Notes 3.377% Due 2040
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		3.377%
Debt Instrument, Maturity Date, Description	[6],[7]		2040
Proceeds from Issuance of Debt	[6]		$ 1,500
Notes 3.577% Due 2050
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		3.577%
Debt Instrument, Maturity Date, Description	[6],[7]		2050
Proceeds from Issuance of Debt	[6]		$ 2,000
Libor plus 0.45% floating rates due 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		0.45%
Debt Instrument, Maturity Date, Description	[6],[7]		2023
Proceeds from Issuance of Debt	[6]		$ 500
Notes 2.056% Due 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		2.056%
Debt Instrument, Maturity Date, Description	[6],[7]		2025
Proceeds from Issuance of Debt	[6]		$ 1,300
Notes 2.293% Due 2027
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		2.293%
Debt Instrument, Maturity Date, Description	[6],[7]		2027
Proceeds from Issuance of Debt	[6]		$ 500
Notes 2.565% Due 2030
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		2.565%
Debt Instrument, Maturity Date, Description	[6],[7]		2030
Proceeds from Issuance of Debt	[6]		$ 1,500
Notes 3.112% Due 2040
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		3.112%
Debt Instrument, Maturity Date, Description	[6],[7]		2040
Proceeds from Issuance of Debt	[6]		$ 750
Notes 3.362% Due 2050
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[6],[7]		3.362%
Debt Instrument, Maturity Date, Description	[6],[7]		2050
Proceeds from Issuance of Debt	[6]		$ 750
Otis 3-Year Term Loan due 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[7]		1.125%
Debt Instrument, Maturity Date, Description	[6],[7]		2023
Proceeds from Issuance of Debt	[6]		$ 1,000
Carrier 3-Year Term Loan due 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[7]		1.125%
Debt Instrument, Maturity Date, Description	[6],[7]		2023
Proceeds from Issuance of Debt	[6]		$ 1,750

[1] Extinguishment of Raytheon Technologies short term and long term debt in order to achieve the net indebtedness required by the merger agreement with Raytheon.

[2] In connection with the early repayment of outstanding principal, Raytheon Technologies paid approximately $660 million of debt extinguishment costs.

[3] We may redeem these notes at our option pursuant to their terms.

[4] The three-month LIBOR rate as of March 31, 2020 was approximately 1.4505%.

[5] The three-month EURIBOR rate as of March 31, 2020 was approximately -0.363%. 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.

[6] The debt issuances and term loan draws reflect additional debt incurred by Otis and Carrier and attributed to those businesses post Separation Transactions. The net proceeds of these issuances were primarily utilized to extinguish Raytheon Technologies short term and long term debt in order to achieve the applicable net indebtedness required by the merger agreement with Raytheon.

[7] The debt issuances reflect additional debt incurred by Otis and Carrier and attributed to those businesses post Separation Transactions. The net proceeds of these issuances were primarily utilized to extinguish Raytheon Technologies short-term and long-term debt in order to achieve the applicable net indebtedness required by the merger agreement with Raytheon.