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Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant, and Equipment [Line Items]
Contract with customer, liability	$ 243		$ 243		$ 175
Accounts receivable, net	3,096		3,096		$ 2,510
Allowance for doubtful accounts	185		185
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			68.00%
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			65.00%
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%