NOTES PAYABLE - Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Due within one year:
Outstanding, Amount	$ 8,087,168	$ 8,034,175
Outstanding, Weighted - average rate	3.52%	2.31%
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
Total principal net of discounts	26,586,959	$ 25,000,199
Hedging adjustments	(250,417)	(531,086)
Total	$ 26,336,542	24,469,113
Weighted - average rate	3.16%
Total weighted - average rate	3.27%
Two years
Medium-term notes due in:
Weighted - average rate	3.27%
Three years
Medium-term notes due in:
Weighted - average rate	2.27%
Four years
Medium-term notes due in:
Weighted - average rate	3.44%
Five years
Medium-term notes due in:
Weighted - average rate	4.37%
Thereafter
Medium-term notes due in:
Weighted - average rate	2.80%
Discount notes
Due within one year:
Outstanding, Amount	$ 1,734,387	$ 565,578
Outstanding, Weighted - average rate	5.32%	3.91%
Average Outstanding, Amount	$ 1,097,300	$ 1,325,026
Average Outstanding, Weighted - average rate (as a percent)	5.08%	0.96%
Medium-term notes
Due within one year:
Outstanding, Amount	$ 384,970	$ 2,547,733
Outstanding, Weighted - average rate	5.07%	3.54%
Average Outstanding, Amount	$ 1,731,308	$ 1,442,932
Average Outstanding, Weighted - average rate (as a percent)	4.09%	2.11%
Medium-term notes due in:
Two years		$ 4,072,740
Three years		3,506,480
Four years		2,967,625
Five years		2,361,197
Thereafter		4,057,982
Total due after one year		$ 16,966,024
Weighted - average rate		2.15%
Total weighted - average rate		2.20%
Medium-term notes | Two years
Medium-term notes due in:
Weighted - average rate		1.71%
Medium-term notes | Three years
Medium-term notes due in:
Weighted - average rate		2.10%
Medium-term notes | Four years
Medium-term notes due in:
Weighted - average rate		1.44%
Medium-term notes | Five years
Medium-term notes due in:
Weighted - average rate		3.12%
Medium-term notes | Thereafter
Medium-term notes due in:
Weighted - average rate		2.60%
Current portion of medium-term notes
Due within one year:
Outstanding, Amount	$ 5,967,811	$ 4,920,864
Outstanding, Weighted - average rate	2.90%	1.49%