Dividends Declared (Detail) - USD ($) $ / shares in Units, $ 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 |
|
| Equity [Abstract] | |||||||||||
| Declaration Date | Jun. 12, 2019 | Mar. 11, 2019 | Nov. 28, 2018 | Sep. 18, 2018 | Jun. 13, 2018 | Mar. 12, 2018 | Nov. 29, 2017 | Sep. 19, 2017 | |||
| Record Date | Aug. 15, 2019 | May 16, 2019 | Feb. 21, 2019 | Nov. 15, 2018 | Aug. 16, 2018 | May 17, 2018 | Feb. 15, 2018 | Nov. 16, 2017 | |||
| Payment Date | Sep. 12, 2019 | Jun. 13, 2019 | Mar. 14, 2019 | Dec. 13, 2018 | Sep. 13, 2018 | Jun. 14, 2018 | Mar. 08, 2018 | Dec. 14, 2017 | |||
| Dividend Per Share | $ 0.46 | $ 0.46 | $ 0.46 | $ 0.46 | $ 0.42 | $ 0.42 | $ 0.42 | $ 0.42 | $ 1.84 | $ 1.68 | $ 1.56 |
| Amount | $ 3,516 | $ 3,521 | $ 3,526 | $ 3,544 | $ 3,220 | $ 3,226 | $ 3,232 | $ 3,238 | $ 14,107 | $ 12,916 | |