Contingent Liabilities (Details) € in Millions, $ in Millions		3 Months Ended		9 Months Ended			12 Months Ended
	Sep. 13, 2021 defendent	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 EUR (€)	Sep. 30, 2021 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 EUR (€)	Sep. 30, 2022 EUR (€)	Dec. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Income tax expense		$ 143	$ 128	$ 382		$ 404
Number of defendants | defendent	3
Environmental Regulation
Loss Contingencies [Line Items]
Loss contingency accrual		5		5						$ 12
German Tax Office Against Otis
Loss Contingencies [Line Items]
Income tax expense				208	€ 215
Disallowed tax benefit, estimated interest expense				114	€ 118
Unrecognized tax benefits, interest on income taxes expense							$ 300	€ 275
Unrecognized tax benefits, interest on income taxes accrued		43		43					€ 45
Asbestos Matter
Loss Contingencies [Line Items]
Insurance recovery receivable		5		5						5
Asbestos Matter | Minimum
Loss Contingencies [Line Items]
Estimate of possible loss		22		22						22
Asbestos Matter | Maximum
Loss Contingencies [Line Items]
Estimate of possible loss		$ 45		$ 45						$ 45