Revenue (Deferred Revenue Activity) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025
Contract Liability [Roll Forward]
Beginning Balance	$ 170	$ 138
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period	163	180
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(86)	(53)
Ending Balance	$ 247	$ 265