The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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GOODWILL, INTANGIBLE ASSETS AND OTHER LONG-LIVED ASSETS - Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Finite-lived intangible assets
Gross Carrying Amount	$ 3,147		$ 3,147		$ 3,180
Accumulated Amortization	(1,470)		(1,470)		(1,368)
Net Carrying Amount	1,677		1,677		1,812
Amortization expense	40	$ 41	122	$ 126
Supply and distribution agreements
Finite-lived intangible assets
Gross Carrying Amount	1,114		1,114		1,136
Accumulated Amortization	(582)		(582)		(552)
Net Carrying Amount	532		$ 532		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	174		$ 174		174
Accumulated Amortization	(149)		(149)		(144)
Net Carrying Amount	25		$ 25		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	41		$ 41		44
Accumulated Amortization	(36)		(36)		(37)
Net Carrying Amount	5		$ 5		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	1,816		$ 1,816		1,824
Accumulated Amortization	(701)		(701)		(633)
Net Carrying Amount	1,115		$ 1,115		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		2
Accumulated Amortization	(2)		(2)		(2)
Net Carrying Amount	$ 0		$ 0		$ 0
Other intangible assets \| Maximum
Finite-lived intangible assets
Amortization Period			15 years