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Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Sep. 28, 2019 | Sep. 29, 2018 | Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for future grant | 12,952,617 |  |
Cash received from exercise of stock options | $ 99 | $ 102 | $ 154
Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 2.50% | 1.50% |
Vesting period | 3 years |  |
Expiration period | 10 years |  |
Grant-date fair value of options granted | $ 11.35 | $ 18.31 | $ 13.42
Stock-based compensation expense, net of income taxes | $ 16 | $ 13 | $ 22
Related tax benefit | $ 3 | $ 6 | $ 14
Options vested (in shares) | 1,200,000 | 2,200,000 | 4,100,000
Grant date fair value of options vested | $ 18 | $ 27 | $ 47
Cash received from exercise of stock options | 99 | 102 | 154
Tax benefit related to stock options exercised | 21 | 30 | 65
Total intrinsic value of options exercised | 79 | 103 | 164
Amount realized, related to excess tax deductions | 14 | 20 | $ 42
Total unrecognized compensation cost related to stock option plans | $ 18 |  |
Total unrecognized compensation cost, time frame for recognition, weighted average number of years | 1 year 6 months |  |
Stock Options [Member] | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate |  |  | 1.30%
Stock Options [Member] | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate |  |  | 1.40%
Restricted Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense, net of income taxes | $ 26 | 22 | $ 18
Related tax benefit | $ 8 | $ 9 | $ 11
Total unrecognized compensation cost, time frame for recognition, weighted average number of years | 1 year 10 months 24 days |  |
Number of Shares - Vested | (540,075) | (600,000) | (500,000)
Restricted stock awards, grant date fair value of shares vested | $ 29 | $ 27 | $ 19
Total unrecognized compensation cost related to share-based awards other than options | $ 46 |  |
Performance Shares [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period | 3 years |  |
Stock-based compensation expense, net of income taxes | $ 16 | 12 | 16
Related tax benefit | $ 4 | $ 5 | $ 10
Total unrecognized compensation cost, time frame for recognition, weighted average number of years | 1 year 9 months 18 days |  |
Number of Shares - Vested | (825,361) |  |
Total unrecognized compensation cost related to share-based awards other than options | $ 26 |  |
Performance Shares [Member] | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting rights, performance criteria | 0.00% |  |
Performance Shares [Member] | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting rights, performance criteria | 200.00% |  |

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