Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 6,026
Goodwill related to acquisitions	(320)
Foreign currency translation and other adjustments	2
Ending balance	5,708
Goodwill accumulated impairment loss	1,557
General rentals
Goodwill [Roll Forward]
Beginning balance	4,980
Goodwill related to acquisitions	(309)
Foreign currency translation and other adjustments	0
Ending balance	4,671
Specialty
Goodwill [Roll Forward]
Beginning balance	1,046
Goodwill related to acquisitions	(11)
Foreign currency translation and other adjustments	2
Ending balance	$ 1,037