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GOODWILL AND OTHER INTANGIBLE ASSETS Balances and Changes in Carrying Amounts of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 424	$ 544
Impairment		(105)
Translation	5	(15)
Goodwill, ending balance	429	424
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Cumulative goodwill impairment charges, December 31, 2019 (1)	184
United States
Goodwill [Roll Forward]
Goodwill, beginning balance	192	192
Impairment		0
Translation	0	0
Goodwill, ending balance	192	192
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Cumulative goodwill impairment charges, December 31, 2019 (1)	0
Canada
Goodwill [Roll Forward]
Goodwill, beginning balance	120	130
Impairment		0
Translation	6	(10)
Goodwill, ending balance	126	120
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Cumulative goodwill impairment charges, December 31, 2019 (1)	32
Other businesses
Goodwill [Roll Forward]
Goodwill, beginning balance	112	222
Impairment		(105)
Translation	(1)	(5)
Goodwill, ending balance	111	$ 112
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Cumulative goodwill impairment charges, December 31, 2019 (1)	$ 152

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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