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SEGMENT INFORMATION - Schedule of Reconciliation of Operating Earnings from Segment to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total consolidated operating earnings	$ 338	$ 189	$ 1,081	$ 868
Assets	5,922		5,922		$ 5,873
Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member]
Segment Reporting Information [Line Items]
Total consolidated operating earnings	373	223	1,171	972
Assets	2,803		2,803		2,684
Eliminations and Unallocated in Consolidation [Member]
Segment Reporting Information [Line Items]
Total consolidated operating earnings	(35)	(34)	(90)	(104)
Assets	103		103		310
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Assets	3,016		3,016		2,879
United States And Canada Segments [Member]
Segment Reporting Information [Line Items]
Total consolidated operating earnings	343	322	1,084	994
United States And Canada Segments [Member] | Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member]
Segment Reporting Information [Line Items]
Total consolidated operating earnings	343	322	1,084	994
Other Businesses [Member] | Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member]
Segment Reporting Information [Line Items]
Total consolidated operating earnings	30	(99)	87	(22)
United States [Member] | Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member]
Segment Reporting Information [Line Items]
Total consolidated operating earnings	343	326	1,088	1,032
Assets	2,637		2,637		2,496
Canada [Member] | Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member]
Segment Reporting Information [Line Items]
Total consolidated operating earnings	0	$ (4)	(4)	$ (38)
Assets	$ 166		$ 166		$ 188

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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