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Segment Information - Reportable Segments and Total Assets (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) segment	Dec. 31, 2024 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	4
Summary of assets by segment
Total assets	$ 179,059	$ 181,403
Advice & Wealth Management
Summary of assets by segment
Total assets	41,699	41,514
Asset Management
Summary of assets by segment
Total assets	7,221	7,350
Retirement & Protection Solutions
Summary of assets by segment
Total assets	113,827	116,609
Corporate & Other
Summary of assets by segment
Total assets	$ 16,312	$ 15,930

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