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Stock Options And Other Stock Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Stock Options And Other Stock Plans [Abstract] |
Schedule Of Stock-Based Compensation | Information regarding stock-based compensation appears in the table below:
Millions | 2020 | 2019 | 2018
Stock-based compensation, before tax: |  |  |  |  |  |
Stock options | $ | 15 | $ | 16 | $ | 17
Retention awards |  | 58 |  | 77 |  | 79
Total stock-based compensation, before tax | $ | 73 | $ | 93 | $ | 96
Excess tax benefits from equity compensation plans | $ | 55 | $ | 52 | $ | 28
Schedule Of Stock Options Weighted Average Assumptions | The table below shows the annual weighted-average assumptions used for valuation purposes:
Weighted-Average Assumptions | 2020 | 2019 | 2018
Risk-free interest rate |  | 1.5% |  | 2.5% |  | 2.6%
Dividend yield |  | 2.1% |  | 2.2% |  | 2.3%
Expected life (years) |  | 4.9 |  | 5.2 |  | 5.3
Volatility |  | 23.4% |  | 22.7% |  | 21.1%
Weighted-average grant-date fair value of options granted | $ | 32.20 | $ | 30.37 | $ | 21.70
Summary Of Stock Options Activity | A summary of stock option activity during 2020 is presented below:
| Options (thous.) | Weighted-Average Exercise Price | Weighted-Average Remaining Contractual Term | Aggregate Intrinsic Value (millions)
Outstanding at January 1, 2020 | 3,502 | $ | 113.38 | 6.1 | yrs. | $ | 236
Granted | 558 |  | 176.63 | N/A |  |  | N/A
Exercised | (1,402) |  | 100.41 | N/A |  |  | N/A
Forfeited or expired | (89) |  | 162.52 | N/A |  |  | N/A
Outstanding at December 31, 2020 | 2,569 | $ | 132.49 | 6.4 | yrs. | $ | 195
Vested or expected to vest ‎ at December 31, 2020 | 2,538 | $ | 132.11 | 6.4 | yrs. | $ | 193
Options exercisable at December 31, 2020 | 1,547 | $ | 112.98 | 5.3 | yrs. | $ | 147
Schedule Of Stock Option Exercises | Additional information regarding stock option exercises appears in the following table:
Millions | 2020 | 2019 | 2018
Intrinsic value of stock options exercised | $ | 120 | $ | 193 | $ | 83
Cash received from option exercises |  | 95 |  | 130 |  | 76
Treasury shares repurchased for employee payroll taxes |  | (24) |  | (37) |  | (20)
Tax benefit realized from option exercises |  | 28 |  | 48 |  | 21
Aggregate grant-date fair value of stock options vested |  | 15 |  | 15 |  | 19
Schedule Of Retention Awards | Changes in our retention awards during 2020 were as follows:
| Shares (thous.) | Weighted-Average ‎Grant-Date Fair Value
Nonvested at January 1, 2020 | 1,898 | $ | 112.12
Granted | 315 |  | 185.99
Vested | (645) |  | 77.74
Forfeited | (92) |  | 141.83
Nonvested at December 31, 2020 | 1,476 | $ | 141.06
Schedule Of Performance Retention Awards | Changes in our performance retention awards during 2020 were as follows:
| Shares (thous.) | Weighted-Average ‎Grant-Date Fair Value
Nonvested at January 1, 2020 | 929 | $ | 123.32
Granted | 287 |  | 177.23
Vested | (339) |  | 102.97
Unearned | (8) |  | 153.89
Forfeited | (96) |  | 153.74
Nonvested at December 31, 2020 | 773 | $ | 148.17

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, 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 (d) -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 (e) -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 (c)(1) -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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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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