Equity - Schedule of other comprehensive income (loss) reclassification adjustments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Other Comprehensive Income (Loss) Reclassification Adjustments
Other comprehensive income (loss)	$ (1,738)	$ (12,617)	$ 2,175	$ (25,728)
Noncontrolling interests
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	(2,305)	(15,058)	1,821	(30,679)
Less: Reclassification adjustments included in net income	(349)	(611)	(810)	(758)
Total other comprehensive income (loss), before of income tax expense (benefit)	(1,956)	(14,447)	2,631	(29,921)
Less: Income tax expense (benefit)	(218)	(1,830)	456	(4,193)
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	97	36	90	(21)
Less: Reclassification adjustments included in net income	(7)	(8)	(23)	(8)
Total other comprehensive income (loss), before of income tax expense (benefit)	104	44	113	(13)
Less: Income tax expense (benefit)	20	8	23	(4)
Other comprehensive income (loss)	84	36	90	(9)
Unrealized Appreciation (Depreciation) of All Other Investments
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	(2,739)	(17,908)	1,827	(37,347)
Less: Reclassification adjustments included in net income	(334)	(596)	(770)	(735)
Total other comprehensive income (loss), before of income tax expense (benefit)	(2,405)	(17,312)	2,597	(36,612)
Less: Income tax expense (benefit)	(407)	(2,530)	343	(5,689)
Other comprehensive income (loss)	(1,998)	(14,782)	2,254	(30,923)
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	(241)	737	(146)	1,728
Less: Reclassification adjustments included in net income	0	0	0	0
Total other comprehensive income (loss), before of income tax expense (benefit)	(241)	737	(146)	1,728
Less: Income tax expense (benefit)	(51)	155	(31)	364
Other comprehensive income (loss)	(190)	582	(115)	1,364
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	531	2,352	4	5,235
Less: Reclassification adjustments included in net income	0	0	0	0
Total other comprehensive income (loss), before of income tax expense (benefit)	531	2,352	4	5,235
Less: Income tax expense (benefit)	158	482	51	1,075
Other comprehensive income (loss)	373	1,870	(47)	4,160
Foreign Currency Translation Adjustments
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	(25)	(273)	(44)	(276)
Less: Reclassification adjustments included in net income	0	0	0	0
Total other comprehensive income (loss), before of income tax expense (benefit)	(25)	(273)	(44)	(276)
Less: Income tax expense (benefit)	34	62	43	65
Other comprehensive income (loss)	(59)	(335)	(87)	(341)
Retirement Plan Liabilities Adjustment
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	72	2	90	6
Less: Reclassification adjustments included in net income	(8)	(7)	(17)	(15)
Total other comprehensive income (loss), before of income tax expense (benefit)	80	9	107	21
Less: Income tax expense (benefit)	28	(7)	27	(4)
Other comprehensive income (loss)	52	16	80	25
Fair Value of Liabilities Under Fair Value Option Attributable to Changes in Our Own Credit Risk
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	0	(4)	0	(4)
Less: Reclassification adjustments included in net income	0	0	0	0
Total other comprehensive income (loss), before of income tax expense (benefit)	0	(4)	0	(4)
Less: Income tax expense (benefit)	0	0	0	0
Other comprehensive income (loss)	$ 0	$ (4)	$ 0	$ (4)