Supplementary Information - Interest and Other Income, Net (Detail) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Segment Reporting [Abstract]
Earnings of equity method investments			$ 206	$ 164		$ 40
Interest income			100	99		33
Gain on sale of Liberty shares	[1]		36	325		28
Loss on Blue Chip Swap transactions	[1]			(139)
Gain on ADC equity investment	[1]			107
Gain on sale of real estate	[1]			43
Gain on repurchase of bonds		$ 11		11	[1]
Unrealized gain on marketable securities	[1]					47
Interest and other income, net			$ 342	$ 610		$ 148

[1] See Note 3 – Charges and Credits