Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 6,026
Goodwill related to acquisitions	(234)
Foreign currency translation and other adjustments	0
Ending balance	5,792
Goodwill accumulated impairment loss	1,557
General rentals
Goodwill [Roll Forward]
Beginning balance	4,980
Goodwill related to acquisitions	(223)
Foreign currency translation and other adjustments	2
Ending balance	4,759
Specialty
Goodwill [Roll Forward]
Beginning balance	1,046
Goodwill related to acquisitions	(11)
Foreign currency translation and other adjustments	(2)
Ending balance	$ 1,033