Equity - Schedule of OCI reclassification adjustments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	$ (907)	$ 3,335
Less: Reclassification adjustments included in net income	(342)	(101)
Total other comprehensive income (loss), before income tax expense (benefit)	(565)	3,436
Less: Income tax expense (benefit)	79	631
Other comprehensive income (loss)	(644)	2,805
Unrealized Appreciation (Depreciation) of Fixed Maturity Securities on Which allowance for credit losses was Taken
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	39	24
Less: Reclassification adjustments included in net income	(6)	(14)
Total other comprehensive income (loss), before income tax expense (benefit)	45	38
Less: Income tax expense (benefit)	10	8
Other comprehensive income (loss)	35	30
Change in unrealized depreciation of investments
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	(1,583)	3,779
Less: Reclassification adjustments included in net income	(336)	(87)
Total other comprehensive income (loss), before income tax expense (benefit)	(1,247)	3,866
Less: Income tax expense (benefit)	(71)	734
Other comprehensive income (loss)	(1,176)	3,132
Change in fair value of market risk benefits attributable to changes in our own credit risk
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	(29)	94
Less: Reclassification adjustments included in net income	0	0
Total other comprehensive income (loss), before income tax expense (benefit)	(29)	94
Less: Income tax expense (benefit)	(6)	20
Other comprehensive income (loss)	(23)	74
Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	695	(595)
Less: Reclassification adjustments included in net income	0	0
Total other comprehensive income (loss), before income tax expense (benefit)	695	(595)
Less: Income tax expense (benefit)	152	(130)
Other comprehensive income (loss)	543	(465)
Cash Flow Hedges
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	(25)	(7)
Less: Reclassification adjustments included in net income	0	0
Total other comprehensive income (loss), before income tax expense (benefit)	(25)	(7)
Less: Income tax expense (benefit)	(5)	(3)
Other comprehensive income (loss)	(20)	(4)
Foreign Currency Translation Adjustments
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	(4)	37
Less: Reclassification adjustments included in net income	0	0
Total other comprehensive income (loss), before income tax expense (benefit)	(4)	37
Less: Income tax expense (benefit)	(1)	1
Other comprehensive income (loss)	(3)	36
Retirement Plan Liabilities Adjustment
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	0	3
Less: Reclassification adjustments included in net income	0	0
Total other comprehensive income (loss), before income tax expense (benefit)	0	3
Less: Income tax expense (benefit)	0	1
Other comprehensive income (loss)	$ 0	$ 2