FAIR VALUE MEASUREMENTS (Schedule of Unrealized Gains Losses Related to Available-for-sale Investments) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 2,546	$ 2,439
Total Unrealized Gains	1,914	2,164
Total Unrealized Losses	(94)	(22)
Total Fair Value	4,366	4,581
Amount primarily related to deferred taxes on appreciation of investment value	731	783
Short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	73	22
Total Unrealized Gains	0	0
Total Unrealized Losses	0	0
Total Fair Value	73	22
Global equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	468	479
Total Unrealized Gains	1,876	2,066
Total Unrealized Losses	(17)	(10)
Total Fair Value	2,327	2,535
Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,005	1,938
Total Unrealized Gains	38	98
Total Unrealized Losses	(77)	(12)
Total Fair Value	$ 1,966	$ 2,024