Investments - Carrying Values of Other Long-Term Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Unfunded commitments, percentage expected to fund in next fiscal year	30.00%
Income distributions	$ 487	$ 568	$ 227
Other long-term investments	3,728
Other long term investments, including held for sale assets		3,574
Unfunded commitments	2,372
Real estate investments
Schedule of Investments [Line Items]
Other long-term investments	1,319
Other long term investments, including held for sale assets		1,152
Unfunded commitments	668
Securities partnerships
Schedule of Investments [Line Items]
Other long-term investments	2,166
Other long term investments, including held for sale assets		2,272
Unfunded commitments	1,704
Other
Schedule of Investments [Line Items]
Other long-term investments	243
Other long term investments, including held for sale assets		$ 150
Unfunded commitments	$ 0