Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	$ 102,330
Net change related to other comprehensive income (loss)	279	$ (361)
Balance, end of period	106,061	85,967
Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	0	173
Unrealized gains (losses), net of tax	(6)	44
Tax expense (benefit) included in provision for income taxes	(1)	3
Amounts reclassified from accumulated other comprehensive income (loss)	4	(89)
Net change related to other comprehensive income (loss)	(2)	(45)
Balance, end of period	(2)	128
Derivatives | Revenue
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustments for (gains) losses	5	(92)
Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	1,488	(850)
Unrealized gains (losses), net of tax	576	(323)
Tax expense (benefit) included in provision for income taxes	0	(16)
Amounts reclassified from accumulated other comprehensive income (loss)	1	62
Net change related to other comprehensive income (loss)	577	(261)
Cumulative effect of accounting changes	0	(67)
Balance, end of period	2,065	(1,178)
Investments | Other Income (Expense), Net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustments for (gains) losses	1	78
Translation adjustments and other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(1,828)	(1,510)
Net change related to other comprehensive income (loss)	(296)	(55)
Balance, end of period	(2,124)	(1,565)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(340)	(2,187)
Net change related to other comprehensive income (loss)	279	(361)
Cumulative effect of accounting changes	0	(67)
Balance, end of period	$ (61)	$ (2,615)