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Equity - Summary of Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2023
Sep. 30, 2022
Mar. 31, 2022
Sep. 30, 2021
Dividends declared per share (usd per share)   $ 0.33   $ 0.30
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance $ 3,503   $ 3,226  
Net income 99 $ 99 82 $ 82
Other comprehensive income (loss), net   35   (6)
Other activity 2      
Dividends declared   (60)   (55)
Stock incentive plan activity   10   4
Repurchase of common stock       (45)
Ending balance 3,589 3,589   3,206
Common Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance 2   2  
Ending balance   2   2
Capital in Excess of Par Value        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance 2,134   2,089  
Stock incentive plan activity   18   10
Ending balance   2,152   2,099
Retained Earnings        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance 2,292   2,154  
Net income   99   82
Dividends declared   (60)   (55)
Ending balance   2,331   2,181
Accumulated Other Comprehensive Income (Loss)        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance (226)   (371)  
Other comprehensive income (loss), net   35   (6)
Ending balance   (191)   (377)
Treasury Stock        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance (708)   (656)  
Stock incentive plan activity   (8)   (6)
Repurchase of common stock       (45)
Ending balance   (716)   (707)
Non-Controlling Interest        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance 9   $ 8  
Other comprehensive income (loss), net       0
Other activity $ 2      
Ending balance   $ 11   $ 8