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INVESTMENTS - Summary of Investments by Major Security Type (Details) - USD ($) $ in Millions		Mar. 31, 2023	Dec. 31, 2022
Debt securities:
Cost		$ 363	$ 176
Gross Unrealized Gains /Upward Adjustments		0	0
Gross Unrealized Losses /Downward Adjustments		(4)	(1)
Carrying Value		359	175
Equity securities:
Cost		1,167	1,819
Gross Unrealized Gains /Upward Adjustments		259	1,611
Gross Unrealized Losses /Downward Adjustments		(620)	(641)
Carrying Value		806	2,789
Short-term Investments
Debt securities:
Cost		363	176
Long-term Investments
Debt securities:
Cost		374	576
Gross Unrealized Gains/Upward Adjustments		0	0
Gross Unrealized Losses/Downward Adjustments		(6)	(11)
Carrying Value		368	565
Equity securities:
Cost		793	1,243
Gross Unrealized Gains /Upward Adjustments		259	1,611
Gross Unrealized Losses /Downward Adjustments		(614)	(630)
Carrying Value		438	2,224
International government securities | Short-term Investments
Debt securities:
Cost		38	13
Gross Unrealized Gains/Upward Adjustments		0	0
Gross Unrealized Losses/Downward Adjustments		0	0
Carrying Value		38	13
International government securities | Long-term Investments
Debt securities:
Cost		41	63
Gross Unrealized Gains/Upward Adjustments		0	0
Gross Unrealized Losses/Downward Adjustments		(1)	(1)
Carrying Value		40	62
U.S. government securities | Short-term Investments
Debt securities:
Cost	[1]	145	131
Gross Unrealized Gains/Upward Adjustments	[1]	0	0
Gross Unrealized Losses/Downward Adjustments	[1]	(1)	(1)
Carrying Value	[1]	144	130
U.S. government securities | Long-term Investments
Debt securities:
Cost		113	147	[1]
Gross Unrealized Gains/Upward Adjustments		0	0	[1]
Gross Unrealized Losses/Downward Adjustments		(2)	(3)	[1]
Carrying Value		111	144	[1]
Corporate debt securities | Short-term Investments
Debt securities:
Cost		180	32
Gross Unrealized Gains/Upward Adjustments		0	0
Gross Unrealized Losses/Downward Adjustments		(3)	0
Carrying Value		177	32
Corporate debt securities | Long-term Investments
Debt securities:
Cost		220	366
Gross Unrealized Gains/Upward Adjustments		0	0
Gross Unrealized Losses/Downward Adjustments		(3)	(7)
Carrying Value		217	359
Equity securities with readily determinable fair values | Long-term Investments
Equity securities:
Cost		715	1,165
Gross Unrealized Gains /Upward Adjustments		0	1,352
Gross Unrealized Losses /Downward Adjustments		(430)	(446)
Carrying Value		285	2,071
Equity securities of private companies | Long-term Investments
Equity securities:
Cost		78	78
Gross Unrealized Gains /Upward Adjustments		259	259
Gross Unrealized Losses /Downward Adjustments		(184)	(184)
Carrying Value		$ 153	$ 153
[1] Includes investments in U.S. municipal bonds.

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