Certain Long-Duration Contracts with Guarantees (Variable Annuity, Variable Life, Variable Universal Life and Universal Life Contracts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Annuity Contracts | Return of net deposits | In the Event of Death
Net Amount at Risk by Product and Guarantee [Line Items]
Account value	$ 77,282,989	$ 103,862,788
Net amount at risk	$ 976,756	$ 27,872
Average attained age of contractholders	70 years	69 years
Annuity Contracts | Minimum return or contract value | In the Event of Death
Net Amount at Risk by Product and Guarantee [Line Items]
Account value	$ 14,521,870	$ 19,634,387
Net amount at risk	$ 4,053,465	$ 1,124,519
Average attained age of contractholders	72 years	72 years
Annuity Contracts | Minimum return or contract value | At Annuitization / Accumulation
Net Amount at Risk by Product and Guarantee [Line Items]
Account value	$ 84,579,903	$ 113,689,139
Net amount at risk	$ 8,644,043	$ 1,653,394
Average attained age of contractholders	70 years	69 years
Average period remaining until earliest expected annuitization	0 years	0 years
Variable Life, Variable Universal Life and Universal Life Contracts | In the Event of Death
Net Amount at Risk by Product and Guarantee [Line Items]
Separate account value	$ 3,711,310	$ 4,473,502
General account value	11,081,838	10,558,009
Net amount at risk	$ 155,866,833	$ 149,872,088
Average attained age of contractholders	58 years	58 years