Derivative Instruments - Schedule of Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Financial Assets
Gross amount of recognized assets	$ 16,626	$ 11,867
Gross amounts offset	(7,051)	(4,453)
Net amount of assets	9,575	7,414
Cash collateral	(7,683)	(5,229)
Non-cash collateral	(925)	(1,245)
Net amount	967	940
Financial Liabilities
Gross amount of recognized liabilities	11,801	10,596
Gross amounts offset	(23)	(612)
Net amount of liabilities	11,778	9,984
Cash collateral	(49)	(188)
Non-cash collateral	(157)	(167)
Net amount	11,572	9,629
Excess non-cash collateral received	1,300	1,300
Excess non-cash collateral pledged	51	82
Derivative Instruments
Financial Assets
Gross amount of recognized assets	15,659	10,927
Gross amounts offset	(7,051)	(4,453)
Net amount of assets	8,608	6,474
Cash collateral	(7,683)	(5,229)
Non-cash collateral	(925)	(1,245)
Net amount	0	0
Financial Liabilities
Gross amount of recognized liabilities	229	967
Gross amounts offset	(23)	(612)
Net amount of liabilities	206	355
Cash collateral	(49)	(188)
Non-cash collateral	(157)	(167)
Net amount	0	0
Embedded Derivative Instruments
Financial Assets
Gross amount of recognized assets	967	940
Gross amounts offset	0	0
Net amount of assets	967	940
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	967	940
Financial Liabilities
Gross amount of recognized liabilities	11,572	9,629
Gross amounts offset	0	0
Net amount of liabilities	11,572	9,629
Cash collateral	0	0
Non-cash collateral	0	0
Net amount	$ 11,572	$ 9,629