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RESTRUCTURING RESERVES - Schedule of Cumulative Amounts Incurred to Date and Expected (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items] |
Cumulative amount incurred to date | $ 248
Additional amount expected | 3
Segments | United States |
Restructuring Cost and Reserve [Line Items] |
Cumulative amount incurred to date | 70
Additional amount expected | 3
Segments | Canada |
Restructuring Cost and Reserve [Line Items] |
Cumulative amount incurred to date | 93
Additional amount expected | 0
Segments | Other businesses |
Restructuring Cost and Reserve [Line Items] |
Cumulative amount incurred to date | 67
Additional amount expected | 0
Unallocated expense |
Restructuring Cost and Reserve [Line Items] |
Cumulative amount incurred to date | 18
Additional amount expected | $ 0

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- Definition Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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