GOODWILL, INTANGIBLE ASSETS AND OTHER LONG-LIVED ASSETS - Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Finite-lived intangible assets
Gross  Carrying  Amount	$ 3,159		$ 3,180
Accumulated Amortization	(1,397)		(1,368)
Net  Carrying  Amount	1,762		1,812
Amortization expense	41	$ 43
Supply and distribution agreements
Finite-lived intangible assets
Gross  Carrying  Amount	1,123		1,136
Accumulated Amortization	(559)		(552)
Net  Carrying  Amount	$ 564		584
Supply and distribution agreements | Minimum
Finite-lived intangible assets
Amortization Period	3 years
Supply and distribution agreements | Maximum
Finite-lived intangible assets
Amortization Period	20 years
Technology
Finite-lived intangible assets
Gross  Carrying  Amount	$ 172		174
Accumulated Amortization	(145)		(144)
Net  Carrying  Amount	$ 27		30
Technology | Minimum
Finite-lived intangible assets
Amortization Period	2 years
Technology | Maximum
Finite-lived intangible assets
Amortization Period	7 years
Internet domain names
Finite-lived intangible assets
Gross  Carrying  Amount	$ 42		44
Accumulated Amortization	(36)		(37)
Net  Carrying  Amount	$ 6		7
Internet domain names | Minimum
Finite-lived intangible assets
Amortization Period	5 years
Internet domain names | Maximum
Finite-lived intangible assets
Amortization Period	20 years
Trade Names
Finite-lived intangible assets
Gross  Carrying  Amount	$ 1,820		1,824
Accumulated Amortization	(655)		(633)
Net  Carrying  Amount	$ 1,165		1,191
Trade Names | Minimum
Finite-lived intangible assets
Amortization Period	4 years
Trade Names | Maximum
Finite-lived intangible assets
Amortization Period	20 years
Other Intangible Assets
Finite-lived intangible assets
Gross  Carrying  Amount	$ 2		2
Accumulated Amortization	(2)		(2)
Net  Carrying  Amount	$ 0		$ 0
Other Intangible Assets | Maximum
Finite-lived intangible assets
Amortization Period	15 years