Equity Method Investments (Reconciliation Of Investments In Equity Affiliates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity Method Investments [Roll Forward]
Beginning of year	$ 1,251	$ 3,533
Additional investments	117	135
Distributions from DIRECTV in excess of cumulative equity in earnings	(928)	(2,049)	$ (2,649)
Dividends and distributions of cumulative earnings received	(2,033)	(1,668)
Equity in net income of affiliates	1,989	1,675	1,791
Impairments	155	450
Currency translation adjustments	0	61
Other adjustments	54	14
End of year	$ 295	$ 1,251	$ 3,533