Equity (Schedule of Share Repurchases) (Details) - USD ($) shares in Millions, $ in Millions |
12 Months Ended | ||
---|---|---|---|
Sep. 29, 2018 |
Sep. 30, 2017 |
Oct. 01, 2016 |
|
Class of Stock [Line Items] | |||
Dollars | $ 427 | $ 860 | $ 1,944 |
Class A [Member] | |||
Class of Stock [Line Items] | |||
Shares | 5.9 | 13.5 | 32.1 |
Dollars | $ 427 | $ 860 | $ 1,944 |
Share Repurchase Program [Member] | Class A [Member] | |||
Class of Stock [Line Items] | |||
Shares | 4.9 | 12.5 | 30.8 |
Dollars | $ 350 | $ 797 | $ 1,868 |
To fund certain obligations under equity compensation plans [Member] | Class A [Member] | |||
Class of Stock [Line Items] | |||
Shares | 1.0 | 1.0 | 1.3 |
Dollars | $ 77 | $ 63 | $ 76 |