NOTES PAYABLE - Borrowings (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Due within one year:
Outstanding, Amount	$ 9,048,871	$ 8,087,168
Outstanding, Weighted - average rate	3.95%	3.52%
Medium-term notes due in:
Two years	$ 4,729,447
Three years	4,206,620
Four years	2,679,370
Five years	2,710,065
Thereafter	3,444,344
Total due after one year	17,769,846
Total principal net of discounts	26,818,717	$ 26,586,959
Hedging adjustments	(276,046)	(250,417)
Total	$ 26,542,671	26,336,542
Weighted - average rate	3.31%
Total weighted - average rate	3.53%
Two years
Medium-term notes due in:
Weighted - average rate	2.92%
Three years
Medium-term notes due in:
Weighted - average rate	2.89%
Four years
Medium-term notes due in:
Weighted - average rate	3.96%
Five years
Medium-term notes due in:
Weighted - average rate	4.63%
Thereafter
Medium-term notes due in:
Weighted - average rate	2.84%
Discount notes
Due within one year:
Outstanding, Amount	$ 2,277,122	$ 1,734,387
Outstanding, Weighted - average rate	5.21%	5.32%
Average Outstanding, Amount	$ 1,819,293	$ 1,097,300
Average Outstanding, Weighted - average rate (as a percent)	5.24%	5.08%
Medium-term notes
Due within one year:
Outstanding, Amount	$ 643,430	$ 384,970
Outstanding, Weighted - average rate	5.25%	5.07%
Average Outstanding, Amount	$ 381,667	$ 1,731,308
Average Outstanding, Weighted - average rate (as a percent)	5.26%	4.09%
Medium-term notes due in:
Two years		$ 5,523,671
Three years		3,825,702
Four years		3,038,229
Five years		2,623,202
Thereafter		3,488,987
Total due after one year		$ 18,499,791
Weighted - average rate		3.16%
Total weighted - average rate		3.27%
Medium-term notes | Two years
Medium-term notes due in:
Weighted - average rate		3.27%
Medium-term notes | Three years
Medium-term notes due in:
Weighted - average rate		2.27%
Medium-term notes | Four years
Medium-term notes due in:
Weighted - average rate		3.44%
Medium-term notes | Five years
Medium-term notes due in:
Weighted - average rate		4.37%
Medium-term notes | Thereafter
Medium-term notes due in:
Weighted - average rate		2.80%
Current portion of medium-term notes
Due within one year:
Outstanding, Amount	$ 6,128,319	$ 5,967,811
Outstanding, Weighted - average rate	3.35%	2.90%