DEBT (DETAIL) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
12 Months Ended |
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Sep. 30, 2015 |
Jun. 30, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Dec. 31, 2012 |
Sep. 30, 2015 |
Sep. 30, 2014 |
Dec. 31, 2014 |
Dec. 31, 2013 |
Nov. 12, 2014 |
Jun. 30, 2013 |
Oct. 17, 2012 |
Dec. 31, 2011 |
| Long-Term Debt [Line Items] |
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| Long Term Debt |
$ 1,982
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$ 1,994
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$ 1,982
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$ 1,994
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| Fair Value Adjustment to Debt |
9
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8
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9
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8
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| Long Term Debt Current |
3
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3
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3
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3
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| Long Term Debt Noncurrent |
1,979
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1,991
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1,979
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1,991
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| Interest Rate Swap Agreement, Principal Amount |
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$ 100
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| Line Of Credit Facility Maximum Borrowing Capacity |
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$ 800
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| Short-term debt |
$ 18
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$ 31
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$ 18
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$ 31
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| Short-term Debt, Weighted Average Interest Rate |
0.00%
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0.00%
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0.00%
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0.00%
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| letters of credit sublimit |
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$ 100
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| Reduction In Capital Lease Obligation |
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$ 10
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| Gains (Losses) on Extinguishment of Debt |
$ 0
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$ 5
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$ 0
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(5)
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$ 0
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| Senior Notes Due 2016 |
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| Long-Term Debt [Line Items] |
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| Long Term Debt |
158
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$ 158
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158
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$ 158
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| Debt Instrument Face Amount |
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$ 650
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| Repayments of Debt |
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242
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$ 250
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| Debt Instrument, Interest Rate, Stated Percentage |
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0.00%
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| Senior Notes Due 2019 |
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| Long-Term Debt [Line Items] |
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| Long Term Debt |
$ 143
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$ 143
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$ 143
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$ 143
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| Debt Instrument Face Amount |
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350
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| Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate |
9.00%
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9.00%
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9.00%
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9.00%
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| Repayments of Debt |
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$ 105
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$ 100
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| Senior Notes Due 2022 |
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| Long-Term Debt [Line Items] |
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| Long Term Debt |
$ 600
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|
600
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$ 600
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$ 600
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| Debt Instrument Face Amount |
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600
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| Debt Instrument, Interest Rate, Stated Percentage |
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0.00%
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| Senior Notes Due 2036 |
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| Long-Term Debt [Line Items] |
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| Long Term Debt |
$ 540
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$ 540
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$ 540
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$ 540
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| Debt Instrument Face Amount |
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$ 540
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| Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate |
7.00%
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7.00%
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7.00%
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7.00%
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| Letter Of Credit Under Receivables Purchase Agreement |
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| Long-Term Debt [Line Items] |
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| Long Term Debt |
$ 102
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$ 106
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$ 102
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$ 106
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| Line Of Credit Facility Amount Outstanding |
102
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102
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| Letters of Credit Outstanding, Amount |
2
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2
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| Line of Credit Facility, Current Borrowing Capacity |
250
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250
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| Line of Credit Facility, Current Borrowing Capacity, In Fourth Quarter |
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200
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| Senior Revolving Credit Facility B |
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| Long-Term Debt [Line Items] |
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| Long Term Debt |
0
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0
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0
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0
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| Line Of Credit Facility Amount Outstanding |
0
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0
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| Letters of Credit Outstanding, Amount |
9
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9
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| Line of Credit Facility, Current Borrowing Capacity |
791
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791
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| Capital Lease Obligations |
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| Long-Term Debt [Line Items] |
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| Long Term Debt |
37
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|
47
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37
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47
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| Senior Notes Due 2024 [Member] |
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| Long-Term Debt [Line Items] |
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| Long Term Debt |
$ 393
|
|
$ 392
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$ 393
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|
392
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| Debt Instrument Face Amount |
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$ 400
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| Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate |
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0.00%
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| Debt Issuance Cost |
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$ 4
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