Revenues - Schedule of Significant Changes in Unbilled Revenue and Deferred Revenue (Details) $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)
Unbilled Revenue
Balance at December 31, 2025	$ 6
Amount included in opening balance transferred to other accounts during period	(6)
Amounts recorded during period	48
Amounts recorded during period transferred to other accounts	(41)
Other changes	0
Balance at June 30, 2026	7
Deferred Revenue
Balance at December 31, 2025	418
Amount included in opening balance transferred to other accounts during period	(122)
Amounts recorded during period	437
Amounts recorded during period transferred to other accounts	(294)
Other changes	1
Balance at June 30, 2026	$ 440