Segment Information (Intersegment Assets and Equity Affiliates Investment) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 405,491	$ 394,795
Investments in and Advances to Equity Affiliates	1,011	295
Corporate and eliminations
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	(100,074)	(94,770)
Investments in and Advances to Equity Affiliates	1,011	295
Communications \| Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	496,906	481,757
Investments in and Advances to Equity Affiliates	0	0
Latin America \| Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	8,659	7,808
Investments in and Advances to Equity Affiliates	$ 0	$ 0

Amount of asset recognized for present right to economic benefit.

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+ Details

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References + Details