DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Interest Rate Swap Agreements (Details) - USD ($)	12 Months Ended
Dec. 31, 2017	Dec. 31, 2012
Interest Rate Swap Agreements
Debt issued		$ 400,000,000
Derivatives designated as hedging instruments \| Cash flow hedges \| Interest Rate Swaps \| Three-month LIBOR
Interest Rate Swap Agreements
Interest rate swap loss amortized as an increase to interest expense over the remaining term of the debt		23,000,000
Balance remaining in accumulated other comprehensive loss	$ 8,000,000
Derivatives designated as hedging instruments \| Cash flow hedges \| Interest Rate Swaps \| Other, net \| Three-month LIBOR
Interest Rate Swap Agreements
Ineffective portion of the cash flow hedges		$ 2,000,000

Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580

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