Revenue (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
Percentage of total revenue (as a percent)			1.00%
Revenue recognized that was included in the contract liability balance at the beginning of the period	$ 119	$ 149	$ 705	$ 730
Performance obligation satisfied in previous period	$ 18	$ 18	$ 75	$ 61