Consolidated Statements of Changes in Common Stockholders' Investment - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
May 31, 2019 |
Aug. 31, 2018 |
May 31, 2018 |
Aug. 31, 2017 |
May 31, 2019 |
May 31, 2018 |
May 31, 2017 |
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| Beginning balance | $ 19,416 | $ 16,073 | $ 19,416 | $ 16,073 | $ 13,784 | ||||||||||||||
| Net income | $ (1,969) | [1],[2] | 835 | [1],[2] | $ 1,127 | [3],[4] | 596 | [3],[4] | 540 | 4,572 | 2,997 | ||||||||
| Other comprehensive loss, net of tax | (287) | (163) | (246) | ||||||||||||||||
| Purchase of treasury stock | (1,480) | (1,017) | (509) | ||||||||||||||||
| Cash dividends declared | (683) | (535) | (426) | ||||||||||||||||
| Employee incentive plans and other | 251 | 486 | 473 | ||||||||||||||||
| Ending balance | 17,757 | 19,416 | 17,757 | 19,416 | 16,073 | ||||||||||||||
| Common Stock | |||||||||||||||||||
| Beginning balance | 32 | 32 | 32 | 32 | 32 | ||||||||||||||
| Ending balance | 32 | 32 | 32 | 32 | 32 | ||||||||||||||
| Additional Paid-In Capital | |||||||||||||||||||
| Beginning balance | 3,117 | 3,005 | 3,117 | 3,005 | 2,892 | ||||||||||||||
| Employee incentive plans and other | 114 | 112 | 113 | ||||||||||||||||
| Ending balance | 3,231 | 3,117 | 3,231 | 3,117 | 3,005 | ||||||||||||||
| Retained Earnings | |||||||||||||||||||
| Beginning balance | 24,823 | 20,833 | 24,823 | 20,833 | 18,371 | ||||||||||||||
| Net income | 540 | 4,572 | 2,997 | ||||||||||||||||
| Cash dividends declared | (683) | (535) | (426) | ||||||||||||||||
| Employee incentive plans and other | (32) | (47) | (109) | ||||||||||||||||
| Ending balance | 24,648 | 24,823 | 24,648 | 24,823 | 20,833 | ||||||||||||||
| Accumulated Other Comprehensive Loss | |||||||||||||||||||
| Beginning balance | (578) | (415) | (578) | (415) | (169) | ||||||||||||||
| Other comprehensive loss, net of tax | (287) | (163) | (246) | ||||||||||||||||
| Ending balance | (865) | (578) | (865) | (578) | (415) | ||||||||||||||
| Treasury Stock | |||||||||||||||||||
| Beginning balance | $ (7,978) | $ (7,382) | (7,978) | (7,382) | (7,342) | ||||||||||||||
| Purchase of treasury stock | (1,480) | (1,017) | (509) | ||||||||||||||||
| Employee incentive plans and other | 169 | 421 | 469 | ||||||||||||||||
| Ending balance | $ (9,289) | $ (7,978) | $ (9,289) | $ (7,978) | $ (7,382) | ||||||||||||||
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