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Equity (Schedule of Share Repurchases) (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Oct. 03, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Class of Stock [Line Items] |  |  |
Dollars | $ 207 | $ 252 | $ 427
Class A [Member] |  |  |
Class of Stock [Line Items] |  |  |
Shares | 2.5 | 3.7 | 5.9
Dollars | $ 207 | $ 252 | $ 427
Share Repurchase Program [Member] | Class A [Member] |  |  |
Class of Stock [Line Items] |  |  |
Shares | 1.8 | 2.3 | 4.9
Dollars | $ 150 | $ 150 | $ 350
To fund certain obligations under equity compensation plans [Member] | Class A [Member] |  |  |
Class of Stock [Line Items] |  |  |
Shares | 0.7 | 1.4 | 1.0
Dollars | $ 57 | $ 102 | $ 77

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