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Share Plans (Tables) | 3 Months Ended
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Dec. 25, 2020
Share Plans |
Share-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the | ​
​ | ​ | Quarters Ended | ​
​ | ​ | December 25, | ​ | December 27, | ​
​ |  | 2020 |  | 2019 |
​ | ​ | (in millions) | ​
Share-based compensation expense |  | $ | 19 |  | $ | 22 | ​
Summary of share-based award activity | During the quarter ended December 25, 2020, we granted the following share-based awards as part of our annual incentive plan grant:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Grant-Date | ​
​ |  | Shares |  | Fair Value |
​ | ​ | (in millions) | ​ | ​ | ​ | ​
Share options | ​ | 1.3 | ​ | $ | 22.03 | ​
Restricted share awards | ​ | 0.4 | ​ |  | 105.86 | ​
Performance share awards | ​ | 0.2 | ​ | ​ | 105.86 | ​
Weighted-average assumptions | The assumptions we used in the Black-Scholes-Merton option pricing model for the options granted as part of our annual incentive plan grant were as follows:
​ | ​ | ​ | ​ | ​ | ​
Expected share price volatility |  |  | 28 | % |
Risk-free interest rate | ​ |  | 0.5 | % | ​
Expected annual dividend per share | ​ | $ | 1.92 | ​ | ​
Expected life of options (in years) | ​ |  | 5.4 | ​ | ​

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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