Intangible Assets and Goodwill (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Changes in carrying amount of goodwill by reportable segment:
Goodwill, beginning of period	$ 7,591
Impairments, beginning of period	(1,197)
Net goodwill, beginning of period	6,394
Goodwill Acquired	32
Goodwill impairment charge	0	$ 0
Other adjustments	(83)
Goodwill, end of period	7,540
Impairments, end of period	(1,197)
Net goodwill, end of period	6,343
Construction Industries
Changes in carrying amount of goodwill by reportable segment:
Goodwill, beginning of period	320
Impairments, beginning of period	(22)
Net goodwill, beginning of period	298
Other adjustments	(14)
Goodwill, end of period	306
Impairments, end of period	(22)
Net goodwill, end of period	284
Resource Industries
Changes in carrying amount of goodwill by reportable segment:
Goodwill, beginning of period	4,253
Impairments, beginning of period	(1,175)
Net goodwill, beginning of period	3,078
Other adjustments	(43)
Goodwill, end of period	4,210
Impairments, end of period	(1,175)
Net goodwill, end of period	3,035
Energy & Transportation
Changes in carrying amount of goodwill by reportable segment:
Goodwill, beginning of period	2,959
Goodwill Acquired	32
Other adjustments	(22)
Goodwill, end of period	2,969
All Other Operating Segments
Changes in carrying amount of goodwill by reportable segment:
Goodwill, beginning of period	59
Other adjustments	(4)
Goodwill, end of period	$ 55