Amount of amortization expense (reversal of expense) for deferred policy acquisition costs.

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Name:	us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Deferred Policy Acquisition Costs - Balances and Activity in DAC Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Deferred Policy Acquisition Cost [Line Items]
DAC balance, beginning of period			$ 3,680,430
Amortization	$ (80,043)	$ (73,643)	(158,592)	$ (145,692)
DAC balance, end of period	3,817,119		3,817,119		$ 3,680,430
Term Life [Member]
Deferred Policy Acquisition Cost [Line Items]
DAC balance, beginning of period			3,608,599	3,366,281	3,366,281
Capitalization			277,733		555,162
Amortization			(155,308)		(291,488)
Foreign exchange translation and other			13,339		(21,356)
DAC balance, end of period	3,744,363		3,744,363		3,608,599
Segregated Funds (Canada) [Member]
Deferred Policy Acquisition Cost [Line Items]
DAC balance, beginning of period			55,303	$ 63,029	63,029
Capitalization			1,189		2,959
Amortization			(2,705)		(5,443)
Foreign exchange translation and other			3,021		(5,242)
DAC balance, end of period	$ 56,808		$ 56,808		$ 55,303