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Debt - Revolving Credit Facility (Details) - USD ($)
$ in Millions
Jun. 21, 2023
Jun. 30, 2023
Dec. 31, 2022
Line of Credit      
Line of Credit Facility      
Current borrowing capacity for line of credit facility   $ 1,000  
Maximum borrowing capacity for line of credit facility   1,250  
Default interest rate 2.00%    
Line of credit borrowings outstanding   0 $ 0
Outstanding letters of credit issued against line of credit facility   1 1
Line of Credit | Secured Overnight Financing Rate (SOFR)      
Line of Credit Facility      
Basis spread on variable interest rate 0.10%    
American Enterprise Investment Services, Incorporated      
Line of Credit Facility      
Maximum borrowing capacity for line of credit facility   500  
Line of credit borrowings outstanding   $ 0 $ 0