Revenue Classified by Major Geographic Areas (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2017 |
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| Revenues From External Customers And Long Lived Assets [Line Items] | |||||||||||||
| Revenues | $ 33,717 | $ 30,571 | $ 32,471 | $ 29,084 | $ 30,085 | $ 26,819 | $ 28,918 | $ 24,538 | $ 125,843 | $ 110,360 | $ 96,571 | ||
| United States | |||||||||||||
| Revenues From External Customers And Long Lived Assets [Line Items] | |||||||||||||
| Revenues | [1] | 64,199 | 55,926 | 51,078 | |||||||||
| Other Countries | |||||||||||||
| Revenues From External Customers And Long Lived Assets [Line Items] | |||||||||||||
| Revenues | $ 61,644 | $ 54,434 | $ 45,493 | ||||||||||
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