Revenue Classified by Major Geographic Areas (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Mar. 31, 2018 |
Mar. 31, 2017 |
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| Geographic Information [Line Items] | ||||||
| Revenues | $ 26,819 | $ 23,212 | $ 80,275 | $ 70,966 | ||
| United States | ||||||
| Geographic Information [Line Items] | ||||||
| Revenues | [1] | 13,457 | 12,298 | 41,094 | 37,628 | |
| Other Countries | ||||||
| Geographic Information [Line Items] | ||||||
| Revenues | $ 13,362 | $ 10,914 | $ 39,181 | $ 33,338 | ||
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