Debt - Schedule of Interest Expense (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total Interest Expense	$ 268	$ 222	$ 138
Asset Management
Debt Instrument [Line Items]
Total Interest Expense	145	124	138
Retirement Services
Debt Instrument [Line Items]
Total Interest Expense	$ 123	$ 98	$ 0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details