Revenues - Schedule of Significant Changes in Unbilled Revenue and Deferred Revenue (Details) $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Unbilled Revenue
Balance at December 31, 2024	$ 9
Amount included in opening balance transferred to other accounts during period	(9)
Amounts recorded during period	65
Amounts recorded during period transferred to other accounts	(58)
Other changes	0
Balance at September 30, 2025	7
Deferred Revenue
Balance at December 31, 2024	452
Amount included in opening balance transferred to other accounts during period	(164)
Amounts recorded during period	585
Amounts recorded during period transferred to other accounts	(463)
Other changes	1
Balance at September 30, 2025	$ 411