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SEGMENT INFORMATION - Schedule of Reconciliation of Operating Earnings from Segment to Consolidated (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
Total consolidated operating earnings | $ 380 | $ 344 | $ 743 | $ 679 |
Assets | 5,992 |  | 5,992 |  | $ 5,873
Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total consolidated operating earnings | 409 | 376 | 798 | 749 |
Assets | 2,797 |  | 2,797 |  | 2,684
Eliminations and Unallocated in Consolidation [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total consolidated operating earnings | (29) | (32) | (55) | (70) |
Assets | 108 |  | 108 |  | 310
Segment Reconciling Items [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Assets | 3,087 |  | 3,087 |  | 2,879
United States And Canada Segments [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total consolidated operating earnings | 382 | 335 | 741 | 672 |
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 | 382 | 335 | 741 | 672 |
Other Businesses [Member] | Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total consolidated operating earnings | 27 | 41 | 57 | 77 |
United States [Member] | Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total consolidated operating earnings | 381 | 349 | 745 | 706 |
Assets | 2,625 |  | 2,625 |  | 2,496
Canada [Member] | Segment Balances Before Intersegment Eliminations and Consolidation Reconciling Items [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total consolidated operating earnings | 1 | $ (14) | (4) | $ (34) |
Assets | $ 172 |  | $ 172 |  | $ 188

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