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Equity (Schedule of Share Repurchases) (Details) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 01, 2017 | Apr. 02, 2016 | Apr. 01, 2017 | Apr. 02, 2016
Class of Stock [Line Items] |  |  |  |
Payments for Repurchase of Common Stock |  |  | $ 733 | $ 826
Class A [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Treasury Stock, Shares, Acquired | 2.8 | 7.7 | 11.8 | 16.0
Payments for Repurchase of Common Stock | $ 182 | $ 439 | $ 758 | $ 826
Share Repurchase Program [Member] | Class A [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Treasury Stock, Shares, Acquired | 2.6 | 7.3 | 11.2 | 14.9
Payments for Repurchase of Common Stock | $ 167 | $ 421 | $ 717 | $ 778
Open Market Repurchases [Member] | Class A [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Treasury Stock, Shares, Acquired | 0.2 | 0.4 | 0.6 | 1.1
Payments for Repurchase of Common Stock | $ 15 | $ 18 | $ 41 | $ 48

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