SEGMENT FINANCIAL DATA (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			3
Net Sales	$ 5,002	$ 4,822	$ 12,862	$ 14,107
Operating profit	1,081	629	1,838	1,934
Product
Segment Reporting Information [Line Items]
Net Sales	4,193	3,998	10,615	11,703
Service
Segment Reporting Information [Line Items]
Net Sales	809	824	2,247	2,404
United States Operations
Segment Reporting Information [Line Items]
Net Sales	2,780	2,541	6,983	7,473
Europe
Segment Reporting Information [Line Items]
Net Sales	1,307	1,313	3,455	3,906
Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	715	729	1,879	2,079
Other
Segment Reporting Information [Line Items]
Net Sales	200	239	545	649
Operating Segments
Segment Reporting Information [Line Items]
Net Sales	5,092	4,926	13,113	14,422
Operating profit	1,142	734	2,053	2,136
Operating Segments | HVAC
Segment Reporting Information [Line Items]
Net Sales	2,892	2,602	7,142	7,505
Operating profit	839	404	1,364	1,242
Operating Segments | HVAC | Product
Segment Reporting Information [Line Items]
Net Sales	2,547	2,224	6,180	6,455
Operating Segments | HVAC | Service
Segment Reporting Information [Line Items]
Net Sales	345	378	962	1,050
Operating Segments | Refrigeration
Segment Reporting Information [Line Items]
Net Sales	876	922	2,384	2,839
Operating profit	103	125	263	373
Operating Segments | Refrigeration | Product
Segment Reporting Information [Line Items]
Net Sales	771	823	2,093	2,551
Operating Segments | Refrigeration | Service
Segment Reporting Information [Line Items]
Net Sales	105	99	291	288
Operating Segments | Fire & Security
Segment Reporting Information [Line Items]
Net Sales	1,324	1,402	3,587	4,078
Operating profit	200	205	426	521
Operating Segments | Fire & Security | Product
Segment Reporting Information [Line Items]
Net Sales	965	1,055	2,587	3,011
Operating Segments | Fire & Security | Service
Segment Reporting Information [Line Items]
Net Sales	359	347	1,000	1,067
Eliminations and other
Segment Reporting Information [Line Items]
Net Sales	(90)	(104)	(251)	(315)
Operating profit	(31)	(63)	(122)	(95)
General corporate expenses
Segment Reporting Information [Line Items]
Net Sales	0	0	0	0
Operating profit	$ (30)	$ (42)	$ (93)	$ (107)