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Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Contract with customer, liability	$ 155		$ 155		$ 138
Accounts receivable, net	2,260		2,260		$ 2,230
Allowance for doubtful accounts	176		176
Contract with customer, asset	0		0
Revenue recognized	0	$ 0	0	$ 0
Contract with customer, performance obligation satisfied in previous period	$ 0	$ 0	$ 0	$ 0
Revenues \| Product concentration risk \| Owned equipment rentals
Property, Plant and Equipment [Line Items]
Concentration risk			69.00%
Revenues \| Product concentration risk \| Equipment Rental
Property, Plant and Equipment [Line Items]
Concentration risk			77.00%
Revenues \| Product concentration risk \| General rentals
Property, Plant and Equipment [Line Items]
Concentration risk			72.00%
Revenues \| Geographic Concentration Risk \| US
Property, Plant and Equipment [Line Items]
Concentration risk			91.00%
Revenues \| Customer concentration risk \| Largest customer
Property, Plant and Equipment [Line Items]
Concentration risk			1.00%		1.00%	1.00%	1.00%
Accounts Receivable \| Customer concentration risk \| Largest customer
Property, Plant and Equipment [Line Items]
Concentration risk			1.00%		1.00%