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Equity - Outstanding Capped Calls (Details) - USD ($) shares in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Dec. 01, 2016 | Dec. 31, 2016 | Sep. 01, 2016
Option Indexed to Issuer's Equity [Line Items] |  |  |
Treasury Stock, held (in shares) | 54 |  | 54
Call Option | Purchased options | Minimum |  |  |
Option Indexed to Issuer's Equity [Line Items] |  |  |
Range of value at expiration of outstanding capped calls | $ 0 |  |
Call Option | Purchased options | Maximum |  |  |
Option Indexed to Issuer's Equity [Line Items] |  |  |
Range of value at expiration of outstanding capped calls | $ 719,000,000 |  |
Call Option | Purchased options | 2032C and 2032D convertible senior notes | Subsequent Event |  |  |
Option Indexed to Issuer's Equity [Line Items] |  |  |
Capped call settlement shares received |  | 4 |
Capped call settlement, dollar value of shares received |  | $ 67,000,000 |
Treasury Stock, held (in shares) |  | 4 |

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