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RESTRUCTURING ACTIVITIES (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 39 | $ 43 |
Employee Separation Costs [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 38 | 31 |
Other Restructuring Initiatives [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Incurred cost |  |  | $ 29
Invigorate Program [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 39 | 44 | 76
Incurred cost | 38 | 31 | 69
Invigorate Program [Member] | Cost of Services [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 32 | 21 | 27
Invigorate Program [Member] | Selling, General and Administrative Expenses [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 7 | $ 23 | 49
Management Layer Reduction Initiative [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Incurred cost |  |  | 20
Voluntary Retirement Program (Invigorate Program) [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Incurred cost |  |  | 4
Support Functions Outsourcing [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Incurred cost |  |  | $ 16

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