Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 6,026
Goodwill related to acquisitions	(208)
Foreign currency translation and other adjustments	8
Ending balance	5,826
Goodwill accumulated impairment loss	1,557
General rentals
Goodwill [Roll Forward]
Beginning balance	4,980
Goodwill related to acquisitions	(197)
Foreign currency translation and other adjustments	5
Ending balance	4,788
Specialty
Goodwill [Roll Forward]
Beginning balance	1,046
Goodwill related to acquisitions	(11)
Foreign currency translation and other adjustments	3
Ending balance	$ 1,038