Share Repurchases (Detail) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
Share Repurchases (Detail) - USD ($) $ in Millions	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Share Repurchase Program [Line Items]
Shares of common stock repurchased													31,000,000	32,000,000	69,000,000
Share Repurchase Program 2021
Share Repurchase Program [Line Items]
Shares of common stock repurchased		8,000,000	8,000,000	7,000,000	7,000,000	7,000,000	7,000,000	11,000,000	14,000,000	18,000,000	20,000,000	17,000,000		32,000,000	69,000,000
Value of common stock repurchased		$ 3,500	$ 3,500	$ 2,800	$ 2,800	$ 2,800	$ 2,800	$ 3,560	$ 4,600	$ 4,600	$ 4,600	$ 4,600		$ 11,960	$ 18,400
Share Repurchase Program 2021 and 2024
Share Repurchase Program [Line Items]
Shares of common stock repurchased	8,000,000												31,000,000
Value of common stock repurchased	$ 3,200												$ 13,000

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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