Stock Plans - Weighted Average Risk Assumptions (Details) - Performance Stock Unit |
3 Months Ended |
|---|---|
|
Mar. 31, 2026
$ / shares
| |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Fair value per unit (dollars per share) | $ 222.96 |
| Monte Carlo Approach | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Fair value per unit (dollars per share) | $ 223.21 |
| Risk-free interest rate | 3.52% |
| Expected dividend yield | 1.27% |
| Expected volatility | 23.20% |
| MSA stock beta | 0.725 |
| X | ||||||||||
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Stock Beta No definition available.
|
| X | ||||||||||
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|