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Shareholders' Equity - Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
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Nov. 30, 2019 | Aug. 31, 2019 | May 31, 2019 | Feb. 28, 2019 | Nov. 30, 2018 | Aug. 31, 2018 | May 31, 2018 | Feb. 28, 2018 | Nov. 30, 2017 | Aug. 31, 2017 | May 31, 2017 | Feb. 28, 2017
Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared per share (USD per share) | $ 0.50 | $ 0.50 | $ 0.50 | $ 0.50 | $ 0.50 | $ 0.50 | $ 0.50 | $ 0.45 | $ 0.45 | $ 0.40 | $ 0.40 | $ 0.35
Dividends declared | $ 346 | $ 342 | $ 346 | $ 345 | $ 349 | $ 350 | $ 357 | $ 322 | $ 324 | $ 289 | $ 291 | $ 251

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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- References No definition available. + Details
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