Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 5,940
Goodwill related to acquisitions	936
Foreign currency translation and other adjustments	(13)
Ending balance	6,863
Goodwill accumulated impairment loss	1,557
General rentals
Goodwill [Roll Forward]
Beginning balance	4,775
Goodwill related to acquisitions	2
Foreign currency translation and other adjustments	(4)
Ending balance	4,773
Specialty
Goodwill [Roll Forward]
Beginning balance	1,165
Goodwill related to acquisitions	934
Foreign currency translation and other adjustments	(9)
Ending balance	$ 2,090