Share Repurchases (Detail) - USD ($) shares in Millions, $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2020 |
Mar. 31, 2020 |
Dec. 31, 2019 |
Sep. 30, 2019 |
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, 2020 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Share Repurchases [Line Items] | |||||||||||||||
| Shares of common stock repurchased | 126 | 150 | 99 | ||||||||||||
| Share Repurchase Program 2016 | |||||||||||||||
| Share Repurchases [Line Items] | |||||||||||||||
| Shares of common stock repurchased | 32 | 29 | 33 | 36 | 57 | 24 | 21 | 34 | 22 | 22 | 150 | 99 | |||
| Value of common stock repurchased | $ 4,600 | $ 4,000 | $ 4,200 | $ 3,899 | $ 6,100 | $ 2,600 | $ 2,100 | $ 3,100 | $ 1,800 | $ 1,600 | $ 16,799 | $ 8,600 | |||
| Share Repurchase Programs 2016 and 2019 | |||||||||||||||
| Share Repurchases [Line Items] | |||||||||||||||
| Shares of common stock repurchased | 37 | 126 | |||||||||||||
| Value of common stock repurchased | $ 6,000 | $ 19,688 | |||||||||||||
| Share Repurchase Program 2019 | |||||||||||||||
| Share Repurchases [Line Items] | |||||||||||||||
| Shares of common stock repurchased | 28 | ||||||||||||||
| Value of common stock repurchased | $ 5,088 | ||||||||||||||