Discontinued Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations attributable to common shareowners	$ (33)	$ (410)	$ 2,027
Income (loss) from discontinued operations	(10)	(216)	4,091
Income tax expense from discontinued operations	23	151	1,874
Net income (loss) from discontinued operations	(33)	(367)	2,217
Less: Noncontrolling interest in subsidiaries’ earnings from discontinued operations	0	43	190
Net cash (used in) provided by operating activities	(71)	(728)	3,062
Net cash used in investing activities	0	(241)	(416)
Net cash provided by (used in) financing activities	71	(1,414)	(2,651)
Otis [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations attributable to common shareowners	0	187	1,033
Research and development	0	38	163
Selling, general and administrative expense	0	450	1,906
Other income (expense), net	0	(65)	(40)
Non-operating expense (income), net	0	3	4
Income (loss) from discontinued operations	0	340	1,709
Income tax expense from discontinued operations	0	116	525
Net income (loss) from discontinued operations	0	224	1,184
Less: Noncontrolling interest in subsidiaries’ earnings from discontinued operations	0	37	151
Otis [Member] | Products [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales	0	1,123	5,669
Costs of Goods Sold	0	913	4,656
Otis [Member] | Services [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales	0	1,843	7,444
Costs of Goods Sold	0	1,157	4,635
Carrier [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations attributable to common shareowners	0	196	1,698
Research and development	0	98	400
Selling, general and administrative expense	0	669	2,888
Other income (expense), net	0	(30)	246
Non-operating expense (income), net	0	17	(43)
Income (loss) from discontinued operations	0	304	2,409
Income tax expense from discontinued operations	0	102	672
Net income (loss) from discontinued operations	0	202	1,737
Less: Noncontrolling interest in subsidiaries’ earnings from discontinued operations	0	6	39
Carrier [Member] | Products [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales	0	3,143	15,337
Costs of Goods Sold	0	2,239	10,878
Carrier [Member] | Services [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales	0	741	3,247
Costs of Goods Sold	0	527	2,298
Separation Related Transactions [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations attributable to common shareowners	(33)	(793)	(704)
Selling, general and administrative expense	10	151	16
Other income (expense), net	0	(709)	(11)
Income (loss) from discontinued operations	$ (10)	(860)	(27)
Income tax expense from discontinued operations		$ (67)	$ 677