Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net income attributable to common shareowners:
Net income attributable to Otis Worldwide Corporation	$ 1,406	$ 1,253	$ 1,246
Impact of redeemable noncontrolling interest	0	0	0
Net income attributable to common shareholders	$ 1,406	$ 1,253	$ 1,246
Basic weighted average number of shares outstanding (in shares)	411.4	420.0	427.7
Stock awards and equity units (share equivalent) (in shares)	3.2	3.0	3.7
Diluted weighted average number of shares outstanding (in shares)	414.6	423.0	431.4
Earnings Per Share of Common Stock:
Basic (in usd per share)	$ 3.42	$ 2.98	$ 2.91
Diluted (in usd per share)	$ 3.39	$ 2.96	$ 2.89
Antidilutive securities excluded from computation of EPS (in shares)	1.0	2.3	0.1