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Segment Information - Reportable Segments and Total Assets (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($) segment	Dec. 31, 2023 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	4
Summary of assets by segment
Total assets	$ 179,700	$ 175,191
Advice & Wealth Management
Summary of assets by segment
Total assets	41,893	42,983
Asset Management
Summary of assets by segment
Total assets	7,358	7,288
Retirement & Protection Solutions
Summary of assets by segment
Total assets	113,610	108,451
Corporate & Other
Summary of assets by segment
Total assets	$ 16,839	$ 16,469

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