Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 01, 2025	Jul. 18, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Subsequent Event [Line Items]
Purchase price			$ 2,486	$ 2,289	$ 4,981	$ 5,893
2025 Stockholder Return Program
Subsequent Event [Line Items]
Shares repurchased (in shares)			10,148,791		20,240,018
Average price paid per share (in USD per share)			$ 243.32		$ 244.04
Purchase price			$ 2,500		$ 4,900
Subsequent Event \| UScellular Wireless Assets Operations \| Purchase Agreement
Subsequent Event [Line Items]
Business acquisition, cash transferred	$ 1,700
Subsequent Event \| 2025 Stockholder Return Program
Subsequent Event [Line Items]
Shares repurchased (in shares)		2,032,767
Average price paid per share (in USD per share)		$ 232.16
Purchase price		$ 472

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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