INCOME AND EXCISE TAXES - Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Net increase in stockholders’ equity resulting from operations	$ 1,522	$ 600	$ 1,567
Net unrealized losses (gains) on investments, foreign currency and other transactions	(440)	525	(586)
Income not currently taxable	(157)	(232)	(223)
Income for tax but not book	60	90	162
Expenses not currently deductible	21	56	165
Realized gain/loss difference	60	(101)	(199)
Taxable income	1,066	938	886
Dividend income not taxable until collected	198	175	91
Dividend income collected	$ 11	$ 71	$ 122