Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share Basic And Diluted [Abstract]
Net income available for common shareholders (A)	$ 20,505	$ 13,893
Weighted average outstanding shares of common stock (B)	7,513	7,566
Dilutive effect of stock-based awards	54	71
Common stock and common stock equivalents (C)	7,567	7,637
Earnings Per Share
Basic (A/B)	$ 2.73	$ 1.84
Diluted (A/C)	$ 2.71	$ 1.82

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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