Description of Business and Separation from United Technologies Corporation (Details)	9 Months Ended
	Sep. 30, 2020 segment	Apr. 03, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of segments	2
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of segments	2
Separation | Otis | UTC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Shares of separated company given to shareholders (in shares)		0.5