Intangible Assets and Goodwill (Details 2) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 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	77
Goodwill impairment charge	0	$ 0
Other adjustments	(118)
Goodwill, end of period	7,550
Impairments, end of period	(1,197)
Net goodwill, end of period	6,353
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
Goodwill Acquired	4
Other adjustments	(17)
Goodwill, end of period	307
Impairments, end of period	(22)
Net goodwill, end of period	285
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
Goodwill Acquired	22
Other adjustments	(62)
Goodwill, end of period	4,213
Impairments, end of period	(1,175)
Net goodwill, end of period	3,038
Energy & Transportation
Changes in carrying amount of goodwill by reportable segment:
Goodwill, beginning of period	2,959
Goodwill Acquired	51
Other adjustments	(35)
Goodwill, end of period	2,975
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