v3.25.1
Accumulated Other Comprehensive Loss - Reclassifications out of Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other income $ 0.0 $ 15.0 $ 6.0 $ 24.0
Income before income taxes 299.0 310.0 512.0 570.0
Income tax provision (51.0) (45.0) (86.0) (92.0)
Sales 2,001.0 2,126.0 3,882.0 4,178.0
Cost of sales (1,191.0) (1,293.0) (2,350.0) (2,550.0)
Selling, general and administrative expenses (469.0) (501.0) (945.0) (1,015.0)
Interest expense (39.0) (40.0) (78.0) (73.0)
Net income attributable to Rockwell Automation, Inc. 252.0 266.0 436.0 481.0
Reclassification out of accumulated other comprehensive loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Net income attributable to Rockwell Automation, Inc. 1.0 0.0 6.0 (6.0)
Pension and other postretirement benefit plan adjustments | Reclassification out of accumulated other comprehensive loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Income before income taxes 8.0 1.0 15.0 1.0
Income tax provision (2.0) 0.0 (4.0) 0.0
Net income attributable to Rockwell Automation, Inc. 6.0 1.0 11.0 1.0
Amortization of net actuarial loss | Reclassification out of accumulated other comprehensive loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other income 8.0 1.0 15.0 1.0
Net unrealized losses on cash flow hedges, net of tax | Reclassification out of accumulated other comprehensive loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Income before income taxes (7.0) (5.0) (7.0) (13.0)
Income tax provision 2.0 2.0 2.0 4.0
Net income attributable to Rockwell Automation, Inc. (5.0) (3.0) (5.0) (9.0)
Net unrealized losses on cash flow hedges, net of tax | Forward exchange contracts | Reclassification out of accumulated other comprehensive loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Sales 1.0 (1.0) 2.0 (2.0)
Cost of sales (9.0) (5.0) (11.0) (13.0)
Selling, general and administrative expenses 0.0 0.0 0.0 0.0
Net unrealized losses on cash flow hedges, net of tax | Treasury locks related to 2019 and 2021 debt issuances | Reclassification out of accumulated other comprehensive loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Interest expense 1.0 1.0 2.0 2.0
Accumulated currency translation adjustments, net of tax | Reclassification out of accumulated other comprehensive loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other income $ 0.0 $ 2.0 $ 0.0 $ 2.0