Segment Information - Special Item Charges (Benefits) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pre-tax
Impairment of dividend receivable (Net investment income)	$ 182	$ 0	$ 182	$ 0
Integration and transaction-related costs, pre-tax (Selling, General and administrative expenses)	77	13	177	20
(Gain) loss on sale of business	87	21	106	21
Deferred tax (benefits), net (Income taxes, less amount attributable to noncontrolling interests)	0	0	0	0
(Benefits) charges associated with litigation matters (Selling, general and administrative expenses)	0	201	0	201
Total impact from special items	346	235	465	242
After-tax
Impairment of dividend receivable, after-tax (Net investment income)	138	0	138	0
Integration and transaction-related costs, after-tax (Selling, general and administrative expenses)	59	9	135	15
(Gain) loss on sale of business, after-tax	62	19	19	19
Deferred tax (benefits), net, after-tax (Income taxes, less amount attributable to noncontrolling interests)	41	0	75	0
(Benefits) charges associated with litigation matters, after-tax (Selling, general and administrative expenses)	0	171	0	171
Total impact from special items	$ 300	$ 199	$ 367	$ 205