Accumulated Other Comprehensive Income (Loss) - Schedule of Reconciliation of the Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 41,426	$ 39,405	$ 36,330
Other comprehensive income (loss)	700	160	1,171
Total other comprehensive (income) loss attributable to noncontrolling interests, net of tax (benefit) expense of $—, ($1), and ($1), respectively	(4)	6	6
Ending balance	44,026	41,426	39,405
AOCI Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,147)	(1,313)	(2,490)
Ending balance	(451)	(1,147)	(1,313)
Net unrealized investment gains (losses):
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(523)	(632)	(1,755)
Other comprehensive income (loss), before reclassifications, net of tax benefit (expense) of ($163), $44, and ($218), respectively	530	(153)	760
Amounts reclassified from accumulated other comprehensive income, net of tax benefit (expense) of ($31), ($82), and ($113), respectively	103	256	357
Other comprehensive income (loss)	633	103	1,117
Ending balance	106	(523)	(632)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Total other comprehensive (income) loss attributable to noncontrolling interests, net of tax (benefit) expense of $—, ($1), and ($1), respectively	(4)	6	6
Non-credit components of impairments on investments:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2)	(3)	(3)
Other comprehensive income (loss)	(1)	1	0
Ending balance	(3)	(2)	(3)
Net cash flow hedges:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(207)	(211)	(229)
Other comprehensive income (loss)	8	4	18
Ending balance	(199)	(207)	(211)
Pension and other benefits:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(399)	(459)	(499)
Other comprehensive income (loss)	67	60	40
Ending balance	(332)	(399)	(459)
Future policy benefits:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	8	10	13
Other comprehensive income (loss)	(3)	(2)	(3)
Ending balance	5	8	10
Foreign currency translation adjustments:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(24)	(18)	(17)
Other comprehensive income (loss)	(4)	(6)	(1)
Ending balance	$ (28)	$ (24)	$ (18)