v3.26.1
Derivative Instruments and Hedging Activities - Narrative (Details)
3 Months Ended 9 Months Ended
Jun. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
CNY (¥)
Jun. 30, 2025
CNY (¥)
Jun. 30, 2024
USD ($)
Jun. 30, 2024
CNY (¥)
Mar. 31, 2024
USD ($)
Mar. 31, 2024
CNY (¥)
Derivative [Line Items]                          
Percentage of foreign exchange rate exposure hedged minimum (as percentage) 70.00%     70.00%   70.00%              
Percentage of foreign exchange rate exposure hedged, maximum (as percentage) 90.00%     90.00%   90.00%              
Proceeds from derivative instrument       $ 3,000,000 $ 0                
Cash collateral received $ 0 $ 0   0                  
Cash collateral pledged 0 0   0                  
Pre tax gain to be reclassified within next 12 months 23,000,000     23,000,000                  
Cash Flow Hedging                          
Derivative [Line Items]                          
Ineffectiveness recognized from cash flow hedges 0   $ 0 0 0                
Interest Rate Swap | Net Investment Hedging                          
Derivative [Line Items]                          
Total amount 175,000,000 $ 325,000,000   175,000,000     $ 60,000,000            
Proceeds from derivative instrument 3,000,000                        
Derivative, term of contract   3 years                      
Interest Rate Swap | Net Investment Hedging | Long                          
Derivative [Line Items]                          
Average fixed interest rate (as percentage)   1.85%         2.85% 2.85%          
Interest Rate Swap | Net Investment Hedging | Short                          
Derivative [Line Items]                          
Average fixed interest rate (as percentage)   0.00%         0.00% 0.00%          
Foreign currency exchange derivatives | China | Derivatives and Hedging Activities Designated as Hedging Instruments under ASC 815                          
Derivative [Line Items]                          
Notional amount of derivative asset             $ 58,000,000 ¥ 413,000,000          
Foreign currency exchange derivatives | Net Investment Hedging                          
Derivative [Line Items]                          
Effective portion of pretax gains (loss) related to net investment hedges (1,000,000)   (3,000,000) 5,000,000 0                
Gains reclassified into income for net investment hedges 0   0 0 0                
Foreign currency exchange derivatives | Net Investment Hedging | China                          
Derivative [Line Items]                          
Notional amount of derivative asset $ 41,000,000   $ 78,000,000 $ 41,000,000 $ 78,000,000 ¥ 276,000,000     ¥ 559,000,000 $ 78,000,000 ¥ 570,000,000    
Cross-currency interest rate swaps | Net Investment Hedging | China                          
Derivative [Line Items]                          
Notional amount of derivative asset                       $ 96,000,000 ¥ 685,000,000