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Equity - Capped Calls (Details) - USD ($) $ / shares in Units, shares in Millions | 12 Months Ended
--- | ---
Aug. 30, 2018 | Aug. 31, 2017 | Sep. 01, 2016
Option Indexed to Issuer's Equity [Line Items] |  |  |
Settlement of capped calls, value of shares received | $ 0 | $ (125,000,000) | $ 0
Treasury Stock |  |  |
Option Indexed to Issuer's Equity [Line Items] |  |  |
Settlement of capped calls, value of shares received | $ 429,000,000 | 67,000,000 | $ 23,000,000
Call Option | Purchased options |  |  |
Option Indexed to Issuer's Equity [Line Items] |  |  |
Proceeds received upon settlement of capped calls |  | $ 125,000,000 |
Treasury Shares from Capped Call Settlement | 9 | 4 | 2
Call Option | Purchased options | Treasury Stock |  |  |
Option Indexed to Issuer's Equity [Line Items] |  |  |
Settlement of capped calls, value of shares received | $ 429,000,000 | $ 67,000,000 | $ 23,000,000
Call Option | Purchased options | 2033F Notes |  |  |
Option Indexed to Issuer's Equity [Line Items] |  |  |
Capped calls, underlying common shares (in shares) | 27 |  |
Capped calls, initial strike price (in dollars per share) | $ 10.93 |  |
Capped calls, cap price (in dollars per share) | $ 14.51 |  |
Call Option | Purchased options | 2033F Notes | Minimum |  |  |
Option Indexed to Issuer's Equity [Line Items] |  |  |
Potential value of capped calls at expiration | $ 0 |  |
Call Option | Purchased options | 2033F Notes | Maximum |  |  |
Option Indexed to Issuer's Equity [Line Items] |  |  |
Potential value of capped calls at expiration | $ 98,000,000 |  |

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