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Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Contract with customer, liability	$ 186		$ 185
Accounts receivable, net	2,298		$ 2,357
Allowance for doubtful accounts	181
Contract with customer, asset	0
Revenue recognized	0	$ 0
Contract with customer, performance obligation satisfied in previous period	$ 0	$ 0
Revenues \| Product concentration risk \| Owned equipment rentals
Property, Plant and Equipment [Line Items]
Concentration risk	68.00%
Revenues \| Product concentration risk \| Equipment Rental
Property, Plant and Equipment [Line Items]
Concentration risk	76.00%
Revenues \| Product concentration risk \| General Rentals
Property, Plant and Equipment [Line Items]
Concentration risk	69.00%
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	2.00%		2.00%