SHAREHOLDERS' EQUITY (Summary Of Share-Based Incentive Plan Grant Activity For Options and SAR's) (Details)	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Options and SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares) | shares	147,174
Options granted, weighted average exercise price (in dollars per share) | $ / shares	$ 54.96
Options and SARs | Employees Of Altra
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares) | shares	32,419
Options granted, weighted average exercise price (in dollars per share) | $ / shares	$ 57.64
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards other than options granted (in shares) | shares	31,605
Awards other than options granted, weighted average fair value at grant date (in dollars per share) | $ / shares	$ 134.57
Restricted Stock Awards | Employees Of Altra
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards other than options granted (in shares) | shares	20,114
Awards other than options granted, weighted average fair value at grant date (in dollars per share) | $ / shares	$ 138.11
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards other than options granted (in shares) | shares	257,560
Awards other than options granted, weighted average fair value at grant date (in dollars per share) | $ / shares	$ 141.73
Restricted Stock Units | Employees Of Altra
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards other than options granted (in shares) | shares	161,414
Awards other than options granted, weighted average fair value at grant date (in dollars per share) | $ / shares	$ 135.50
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards other than options granted (in shares) | shares	59,101
Awards other than options granted, weighted average fair value at grant date (in dollars per share) | $ / shares	$ 235.77