Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	$ 118,304
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201601Member	us-gaap:AccountingStandardsUpdate201601Member
Net change related to other comprehensive income (loss)	$ (86)	$ 279
Balance, end of period	123,392	106,061
Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(38)	0
Unrealized gains (losses), net of tax	20	(6)
Tax expense (benefit) included in provision for income taxes	4	(1)
Amounts reclassified from accumulated other comprehensive income (loss)	(16)	4
Net change related to other comprehensive income (loss)	4	(2)
Balance, end of period	(34)	(2)
Derivatives | Revenue
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustments for (gains) losses	(20)	5
Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	5,478	1,488
Unrealized gains (losses), net of tax	(188)	576
Tax expense (benefit) included in provision for income taxes	4	0
Amounts reclassified from accumulated other comprehensive income (loss)	(13)	1
Net change related to other comprehensive income (loss)	(201)	577
Balance, end of period	5,287	2,065
Investments | Cumulative effect of accounting changes
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, end of period	10	0
Investments | Other Income (Expense), Net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustments for (gains) losses	(17)	1
Translation adjustments and other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(2,254)	(1,828)
Net change related to other comprehensive income (loss)	111	(296)
Balance, end of period	(2,143)	(2,124)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	3,186	(340)
Net change related to other comprehensive income (loss)	(86)	279
Balance, end of period	3,110	(61)
Accumulated other comprehensive income (loss) | Cumulative effect of accounting changes
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, end of period	$ 10	$ 0