Equity - Narrative (Details) $ / shares in Units, $ in Millions				1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2024 $ / shares	Mar. 15, 2024 USD ($) $ / shares shares	Mar. 14, 2019 USD ($) $ / shares shares	Jul. 26, 2024 USD ($) shares	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Apr. 30, 2024 USD ($)	Dec. 31, 2023 USD ($) $ / shares
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares					$ 5.00		$ 5.00			$ 5.00
Proceeds from redemption of preferred stock							$ 485	$ 0
Redemption premium realized		$ 15
Common stock, par value (in dollars per share) | $ / shares					$ 2.50		$ 2.50			$ 2.50
Statutory capital and surplus restricted					$ 28,700		$ 28,700			$ 28,500
Authorized repurchase amount									$ 10,000
Remaining authorized repurchase amount									$ 3,900
Shares purchased (in shares) | shares							45,100,000
Aggregate repurchases of common stock					$ 1,677	$ 562	$ 3,359	$ 1,165
New York
Class of Stock [Line Items]
Surplus not available for dividends (as a percent)					10.00%		10.00%
Adjusted net investment income not available for dividends (as a percent)					100.00%		100.00%
Subsequent event
Class of Stock [Line Items]
Shares purchased (in shares) | shares				6,000,000
Aggregate repurchases of common stock				$ 459
Dividends declared, common stock (in dollars per share) | $ / shares	$ 0.40
Series A Preferred Stock
Class of Stock [Line Items]
Issuances (in shares) | shares			20,000
Preferred stock, dividend rate (as a percent)			5.85%
Preferred stock, par value (in dollars per share) | $ / shares			$ 5.00
Preferred stock liquidation preference (in dollars per share) | $ / shares			$ 25,000
Issuance of preferred stock			$ 485
Stock redeemed during the period (in shares) | shares		20,000
Preferred stock redemption price per share (in USD per share) | $ / shares		$ 25,000
Proceeds from redemption of preferred stock		$ 500
Series A Depositary Shares
Class of Stock [Line Items]
Issuances (in shares) | shares			20,000,000
Depository shares, equity interest in preferred stock (as a percent)			0.001
Preferred stock liquidation preference (in dollars per share) | $ / shares			$ 25
Stock redeemed during the period (in shares) | shares		20,000,000
Preferred stock redemption, depository shares equity interest in preferred stock (as a percent)		0.001
Preferred stock redemption price per share (in USD per share) | $ / shares		$ 25.00