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COMMITMENTS AND CONTINGENCIES (Narrative) (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($) Years | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Debt Instrument [Line Items] |  |  |
2016 | $ 182 |  |
2017 | 138 |  |
2018 | 94 |  |
2019 | 67 |  |
2020 | 44 |  |
2021 and thereafter | 152 |  |
Minimum lease payments | 677 |  |
Operating leases, rent expense | 224 | $ 242 | $ 223
Total noncancelable future purchase commitments | 206 |  |
Noncancelable future purchase commitments, to be incurred in 2016 | 96 |  |
Noncancelable future purchase commitments, to be incurred in 2017 and 2018 | $ 84 |  |
Remaining terms of lease obligations, minimum | Years | 8 |  |
Remaining terms of lease obligations, maximum | Years | 32 |  |
Litigation reserves | $ 9 | 11 |
Self-insurance reserves | 124 | $ 113 |
Noncancellable future purchase commitments, to be incurred thereafter | 26 |  |
Letter of Credit [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Letters of credit outstanding, amount | $ 67 |  |

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