Equity - Schedule of other comprehensive income (loss) reclassification adjustments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Other Comprehensive Income (Loss) Reclassification Adjustments
Other comprehensive income (loss)	$ 3,913	$ (13,111)
Noncontrolling interests
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	4,126	(15,621)
Less: Reclassification adjustments included in net income	(461)	(147)
Total other comprehensive income (loss), before of income tax expense (benefit)	4,587	(15,474)
Less: Income tax expense (benefit)	674	(2,363)
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	(7)	(57)
Less: Reclassification adjustments included in net income	(16)	0
Total other comprehensive income (loss), before of income tax expense (benefit)	9	(57)
Less: Income tax expense (benefit)	3	(12)
Other comprehensive income (loss)	6	(45)
Unrealized Appreciation (Depreciation) of All Other Investments
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	4,566	(19,439)
Less: Reclassification adjustments included in net income	(436)	(139)
Total other comprehensive income (loss), before of income tax expense (benefit)	5,002	(19,300)
Less: Income tax expense (benefit)	750	(3,159)
Other comprehensive income (loss)	4,252	(16,141)
Change in Fair Value of Market Risk Benefits Related to Our Own Credit Risk
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	95	991
Less: Reclassification adjustments included in net income	0	0
Total other comprehensive income (loss), before of income tax expense (benefit)	95	991
Less: Income tax expense (benefit)	20	209
Other comprehensive income (loss)	75	782
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	(527)	2,883
Less: Reclassification adjustments included in net income	0	0
Total other comprehensive income (loss), before of income tax expense (benefit)	(527)	2,883
Less: Income tax expense (benefit)	(107)	593
Other comprehensive income (loss)	(420)	2,290
Foreign Currency Translation Adjustments
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	(19)	(3)
Less: Reclassification adjustments included in net income	0	0
Total other comprehensive income (loss), before of income tax expense (benefit)	(19)	(3)
Less: Income tax expense (benefit)	9	3
Other comprehensive income (loss)	(28)	(6)
Retirement Plan Liabilities Adjustment
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	18	4
Less: Reclassification adjustments included in net income	(9)	(8)
Total other comprehensive income (loss), before of income tax expense (benefit)	27	12
Less: Income tax expense (benefit)	(1)	3
Other comprehensive income (loss)	28	9
Fair Value of Liabilities Under Fair Value Option Attributable to Changes in Own Credit Risk
Other Comprehensive Income (Loss) Reclassification Adjustments
Unrealized change arising during period	0	0
Less: Reclassification adjustments included in net income	0	0
Total other comprehensive income (loss), before of income tax expense (benefit)	0	0
Less: Income tax expense (benefit)	0	0
Other comprehensive income (loss)	$ 0	$ 0