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Share-Based Compensation Plans (Narrative) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Unrecognized compensation cost related to unvested RSUs and PRSUs | $ 33.2 |  |  |
Incentive Compensation Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Incentive Compensation Plan, termination period, in years | 10 years |  |  |
Common stock that will be made available for sale, in shares | 3.0 |  |  |
Employee Stock Purchase Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Employee stock purchase plan percentage of purchase price on closing price | 85.00% |  |  |
Shares issued Employee Stock Purchase Plan | 0.5 | 0.6 | 0.5 |
Shares reserved for future issuances | 8.5 |  |  |
RSUs |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Weighted average grant-date fair value |  |  | $ 56.65 |
Total fair value of shares distributed | $ 62.7 | $ 57.2 | $ 49.1 |
Shares vested but not distributed | 0.9 |  |  |
RSUs and PRSUs |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Unrecognized compensation cost related to unvested RSUs and PRSUs that is expected to be recognized over a weighted-average period, Years | 1 year 10 months 24 days |  |  |
Weighted average grant-date fair value | $ 63.73 | $ 67.65 |  |
Amended Employee Stock Purchase Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Share-based compensation arrangement, term of plan | Jul. 01, 2032 |  |  |
Incentive Compensation Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Common stock that will be made available for sale, in shares |  |  |  | 4.3
Amended Incentive Compensation Plan |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Common stock that will be made available for sale, in shares |  |  |  | 6.5

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