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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2020
Income Taxes [Line Items]
Effective tax rate	10.00%	16.00%	13.00%	16.00%
Provision (benefit) for income taxes	$ 1,779	$ 2,091	$ 6,884	$ 6,535
Long-term income taxes	27,157		27,157		$ 29,432
Unrecognized Tax Benefits and Other Income Tax Liabilities
Income Taxes [Line Items]
Long-term income taxes	$ 15,800		$ 15,800		$ 16,600
Earliest Tax Year
Income Taxes [Line Items]
Tax years impacted	1996
Latest Tax Year
Income Taxes [Line Items]
Tax years impacted	2016
India Supreme Court
Income Taxes [Line Items]
Provision (benefit) for income taxes	$ (620)

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Income Taxes [Line Items]

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Tax year impacted by the India Supreme Court Decision.

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due beyond one year or the operating cycle, whichever is longer. Alternate captions include income taxes payable, noncurrent.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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