Investment in Charter Accounted for Using the Equity Method - Class A common stock sold to Charter (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Oct. 31, 2025	Sep. 30, 2025	Sep. 30, 2024
Investments in affiliates accounted for using the Equity Method
Amount of Charter sold		$ 900	$ 226
Charter | Series A common stock
Investments in affiliates accounted for using the Equity Method
Number of Charter sold		2,528,059	698,011
Amount of Charter sold		$ 900	$ 226
Charter | Series A common stock | Subsequent event
Investments in affiliates accounted for using the Equity Method
Number of Charter sold	378,373
Amount of Charter sold	$ 100