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Share-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Summary of Stock Option Activity | A summary of stock option activity is as follows:
|  | Shares (000) |  |  | Wtd. Avg. Exercise Price Per Share |  |  | Wtd. Avg. Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value (in millions) |
Outstanding, January 1, 2021 |  |  | 788 |  |  | $ | 91 |  |  |  |  |  |  |
Granted |  |  | 130 |  |  |  | 92 |  |  |  |  |  |  |
Exercised |  |  | (38 | ) |  |  | 93 |  |  |  |  |  | $ | — |
Expired or cancelled |  |  | (28 | ) |  |  | 123 |  |  |  |  |  |  |
Outstanding, December 31, 2021 |  |  | 852 |  |  | $ | 90 |  |  |  | 6.1 |  |  | $ | 8 |
Exercisable, December 31, 2021 |  |  | 510 |  |  | $ | 89 |  |  |  | 4.8 |  |  | $ | 6 |
Outstanding, January 1, 2022 |  |  | 852 |  |  | $ | 90 |  |  |  |  |  |  |
Granted |  |  | — |  |  | N/A |  |  |  |  |  |  |
Exercised |  |  | — |  |  | N/A |  |  |  |  |  |  |
Expired or cancelled |  |  | — |  |  | N/A |  |  |  |  |  |  |
Outstanding, December 31, 2022 |  |  | 852 |  |  | $ | 90 |  |  |  | 5.1 |  |  | $ | 2 |
Exercisable, December 31, 2022 |  |  | 639 |  |  | $ | 90 |  |  |  | 4.4 |  |  | $ | 2 |
Outstanding, January 1, 2023 |  |  | 852 |  |  |  | 90 |  |  |  |  |  |  |
Granted |  |  | — |  |  | N/A |  |  |  |  |  |  |
Exercised |  |  | (23 | ) |  |  | 76 |  |  |  |  |  |  |
Expired or cancelled |  |  | (19 | ) |  |  | 109 |  |  |  |  |  |  |
Outstanding, December 31, 2023 |  |  | 810 |  |  | $ | 90 |  |  |  | 4.4 |  |  | $ | 1 |
Exercisable, December 31, 2023 |  |  | 706 |  |  | $ | 90 |  |  |  | 4.1 |  |  | $ | 1 |
Schedule of Options Outstanding and Exercisable | Options outstanding and exercisable as of December 31, 2023 were as follows:
|  | Options Outstanding |  |  | Options Exercisable |
Exercise Price |  | Shares (000) |  |  | Weighted- Average Remaining Contractual Life (years) |  |  | Weighted- Average Exercise Price |  |  | Shares (000) |  |  | Weighted- Average Exercise Price |
$75-$80 |  |  | 177 |  |  |  | 1.6 |  |  |  | 76 |  |  |  | 177 |  |  |  | 76 |
$81-$89 |  |  | 179 |  |  |  | 4.5 |  |  |  | 84 |  |  |  | 179 |  |  |  | 84 |
$90-$95 |  |  | 286 |  |  |  | 6.6 |  |  |  | 93 |  |  |  | 182 |  |  |  | 93 |
$96-$123 |  |  | 168 |  |  |  | 3.6 |  |  |  | 109 |  |  |  | 168 |  |  |  | 109 |
|  |  | 810 |  |  |  | 4.4 |  |  | $ | 90 |  |  |  | 706 |  |  | $ | 90 |
Assumptions Used to Estimate Fair Value of Share Awards | We estimated the fair value of stock options on the 2021 grant date using the Black-Scholes option pricing model and the following assumptions:
|  | 2021 |
Average risk-free interest rate |  |  | 0.7 | %
Expected dividend yield |  |  | 2.7 | %
Expected volatility |  |  | 35.0 | %
Expected term (years) |  |  | 6.0 |
Summary of Restricted Stock Activity | A summary of restricted stock activity is as follows:
|  | Shares (000) |  |  | Wtd. Avg. Price Per Share |  |  | Wtd. Avg. Remaining Contractual Term (years) |  |  | Aggregate Intrinsic Value (in millions) |
Unvested, January 1, 2021 |  |  | 484 |  |  | $ | 94 |  |  |  | 1.4 |  |  |  |
Granted |  |  | 208 |  |  |  | 87 |  |  |  |  |  |  |
Vested |  |  | (124 | ) |  |  | 106 |  |  |  |  |  |  |
Forfeited |  |  | (23 | ) |  |  | 84 |  |  |  |  |  |  |
Unvested, December 31, 2021 |  |  | 545 |  |  | $ | 85 |  |  |  | 1.3 |  |  |  |
Granted |  |  | 245 |  |  |  | 104 |  |  |  |  |  |  |
Vested |  |  | (177 | ) |  |  | 80 |  |  |  |  |  |  |
Forfeited |  |  | (25 | ) |  |  | 88 |  |  |  |  |  |  |
Unvested, December 31, 2022 |  |  | 588 |  |  | $ | 94 |  |  |  | 1.4 |  |  |  |
Granted |  |  | 261 |  |  |  | 82 |  |  |  |  |  |  |
Vested |  |  | (177 | ) |  |  | 87 |  |  |  |  |  |  |
Forfeited |  |  | (44 | ) |  |  | 90 |  |  |  |  |  |  |
Unvested, December 31, 2023 |  |  | 628 |  |  | $ | 91 |  |  |  | 1.4 |  |  | $ | 50 |
Performance Share Units | A summary of the performance share units detail by grant year is as follows:
|  | 2020 |  |  | 2021 (Regular) |  |  | 2021 (Additional) |  |  | 2022 (Regular) |  |  | 2022 (Experis) |  |  | 2023 |
Grant Date(s) |  | February 14, 2020 |  |  | February 12, 2021 |  |  | February 12, 2021 |  |  | February 11, 2022 |  |  | February 11, 2022 |  |  | February 17, 2023 |
Performance Period (years) |  | 2020-2022 |  |  | 2021 |  |  | 2021-2022 |  |  | 2022-2024 |  |  | 2022-2024 |  |  | 2023-2025 |
Vesting Date(1) |  | February 2023 |  |  | February 2024 |  |  | February 2023 |  |  | February 2025 |  |  | February 2025 |  |  | February 2026 |
Payout Levels (in units): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold Award |  |  | 59,698 |  |  |  | 61,076 |  |  |  | 39,882 |  |  |  | — |  |  |  | — |  |  |  | — |
Target Award |  |  | 119,395 |  |  |  | 122,152 |  |  |  | 79,763 |  |  |  | 106,116 |  |  |  | 28,275 |  |  |  | 132,537 |
Outstanding Award |  |  | 238,790 |  |  |  | 244,304 |  |  |  | 159,526 |  |  |  | 212,232 |  |  |  | 84,826 |  |  |  | 265,074 |
Shares Issued in 2023 |  | N/A |  |  | N/A |  |  |  | 159,526 |  |  | N/A |  |  | N/A |  |  | N/A |
Payout Achieved Over Performance Period |  |  | — |  | (2) |  | 243,526 |  |  |  | 159,526 |  |  | N/A |  |  | N/A |  |  | N/A |
(1) Awards are scheduled to vest after the Committee determines the achievement of the performance criteria. (2) In the fourth quarter of 2022, the Committee exercised its discretion in respect of the payout of the 2020 grant. On the basis that an additional special one-time grant had been awarded in 2021 to supplement the 2020 grant, the Committee determined that the 2020 grant would have a zero payout.

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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