v3.24.1.u1
Condensed Consolidated Statements of Shareholders' Equity Statement - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Retirement Benefit Adjustments, net of tax
Hedging Adjustments, net of tax
Foreign Currency Translation Adjustments
Treasury Stock
Noncontrolling Interests
Shareholders' Equity Excluding Noncontrolling Interest, Beginning of period at Sep. 30, 2022   $ 0.9 $ 4,748.2 $ 1,109.0 $ (29.7) $ 74.8 $ (308.0) $ (2,341.2)  
Total Shareholders' Equity, Beginning of period at Sep. 30, 2022                 $ 11.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Activity under stock and deferred compensation plans     (27.9)            
Non-cash stock-based compensation expense     37.2            
Payment for share repurchase contracts $ 0.0   0.0            
Net Earnings 146.0     146.0          
Post Holdings Partnering Corporation deemed dividend       (1.2)          
Net change in retirement benefits, net of tax         (1.7)        
Foreign currency translation adjustments             150.3   (1.1)
Purchases of treasury stock               (83.7)  
Net earnings attributable to noncontrolling interests 3.1               0.3
Shareholders' Equity Excluding Noncontrolling Interest, End of period at Mar. 31, 2023 3,473.0 0.9 4,757.5 1,253.8 (31.4) 74.8 (157.7) (2,424.9)  
Total Shareholders' Equity, End of period at Mar. 31, 2023 3,483.9               10.9
Shareholders' Equity Excluding Noncontrolling Interest, Beginning of period at Dec. 31, 2022   0.9 4,737.4 1,201.0 (30.6) 74.8 (190.0) (2,365.2)  
Total Shareholders' Equity, Beginning of period at Dec. 31, 2022                 11.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Activity under stock and deferred compensation plans     (0.1)            
Non-cash stock-based compensation expense     20.2            
Payment for share repurchase contracts     0.0            
Net Earnings 54.1     54.1          
Post Holdings Partnering Corporation deemed dividend       (1.3)          
Net change in retirement benefits, net of tax         (0.8)        
Foreign currency translation adjustments             32.3   (0.8)
Purchases of treasury stock               (59.7)  
Net earnings attributable to noncontrolling interests 1.3               0.1
Shareholders' Equity Excluding Noncontrolling Interest, End of period at Mar. 31, 2023 3,473.0 0.9 4,757.5 1,253.8 (31.4) 74.8 (157.7) (2,424.9)  
Total Shareholders' Equity, End of period at Mar. 31, 2023 3,483.9               10.9
Shareholders' Equity Excluding Noncontrolling Interest, Beginning of period at Sep. 30, 2023 3,842.1 0.9 5,288.1 1,416.5 (30.3) 74.8 (179.6) (2,728.3)  
Total Shareholders' Equity, Beginning of period at Sep. 30, 2023 3,851.3               9.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Activity under stock and deferred compensation plans     (37.8)            
Non-cash stock-based compensation expense     39.8            
Payment for share repurchase contracts (50.0)   (50.0)            
Net Earnings 185.3     185.3          
Post Holdings Partnering Corporation deemed dividend       0.0          
Net change in retirement benefits, net of tax         (6.7)        
Foreign currency translation adjustments             52.4   1.1
Purchases of treasury stock               (44.8)  
Net earnings attributable to noncontrolling interests 0.1               0.1
Shareholders' Equity Excluding Noncontrolling Interest, End of period at Mar. 31, 2024 3,980.3 0.9 5,240.1 1,601.8 (37.0) 74.8 (127.2) (2,773.1)  
Total Shareholders' Equity, End of period at Mar. 31, 2024 3,990.7               10.4
Shareholders' Equity Excluding Noncontrolling Interest, Beginning of period at Dec. 31, 2023   0.9 5,273.1 1,504.6 (30.6) 74.8 (113.8) (2,765.0)  
Total Shareholders' Equity, Beginning of period at Dec. 31, 2023                 8.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Activity under stock and deferred compensation plans     (3.7)            
Non-cash stock-based compensation expense     20.7            
Payment for share repurchase contracts     (50.0)            
Net Earnings 97.2     97.2          
Post Holdings Partnering Corporation deemed dividend       0.0          
Net change in retirement benefits, net of tax         (6.4)        
Foreign currency translation adjustments             (13.4)   1.5
Purchases of treasury stock               (8.1)  
Net earnings attributable to noncontrolling interests 0.1               0.1
Shareholders' Equity Excluding Noncontrolling Interest, End of period at Mar. 31, 2024 3,980.3 $ 0.9 $ 5,240.1 $ 1,601.8 $ (37.0) $ 74.8 $ (127.2) $ (2,773.1)  
Total Shareholders' Equity, End of period at Mar. 31, 2024 $ 3,990.7               $ 10.4