EMPLOYEE BENEFIT PLANS (Details 6) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 plan	Dec. 31, 2011	Dec. 31, 2010
401(k) plan
Minimum employee contribution (as a percent of compensation)	1.00%
Maximum employee contribution (as a percent of compensation)	75.00%
Requisite working period per year, minimum (in hours)	1000 hours	1000 hours	1000 hours
Employer's matching contribution (as a percent)	1.50%	1.50%	1.50%
Contribution expense	$ 32	$ 32	$ 26
Defined benefit pension plans (SERPs)
Number of active non-qualified defined benefit pension plans	1
Number of frozen non-qualified defined benefit pension plans	2
Reconciliation of funded status of plans and the amounts included in the Consolidated Balance Sheets:
Beginning obligations	(285)	(268)
Service cost	(2)	(2)	(2)
Interest cost	(14)	(14)	(14)
Actuarial loss	(30)	(19)
Benefits paid	19	18
Ending obligations	(312)	(285)	(268)
Fair value of plans' assets	0	0
Funded status of plans	(312)	(285)
Assumptions related to projected benefit obligations
Discount rate (as a percent)	4.00%	5.00%
Compensation increase rate (as a percent)	3.00%	3.00%
Accumulated benefit obligation	308	280
Components of net periodic benefit costs
Service costs	2	2	2
Interest costs	14	14	14
Amortization of prior-year service costs	0	0	0
Amortization of net actuarial loss	5	3	1
Net periodic benefit cost	21	19	17
Assumptions related to net periodic benefit costs
Discount rate (as a percent)	5.00%	5.50%	5.75%
Compensation increase rate (as a percent)	3.00%	3.00%	3.00%
Amounts recognized in the Consolidated Balance Sheets consist of:
Other current liability	(20)	(20)
Other long-term liability	(292)	(265)
Accumulated other comprehensive loss	90	65
Total	(222)	(220)
Amounts recognized in other comprehensive income (loss)
Loss adjustments recorded in other comprehensive income (loss)	25	16	20
Net actuarial losses	30	19	21
Amounts that have not yet been recognized as components of net periodic benefit costs
Cumulative net actuarial losses	90	65	49
SERP
Amounts recognized in the Consolidated Balance Sheets consist of:
Other current liability	312
Other long-term liability	(20)
Total	292
Estimated SERP benefit payments
Total	202
2013	20
2014	20
2015	20
2016	21
2017	20
Five Years Thereafter	101
Maximum
Amounts recognized in other comprehensive income (loss)
Amortization of prior-year service costs	1	1	1
Amounts that have not yet been recognized as components of net periodic benefit costs
Unrecognized prior service costs	$ 1	$ 1	$ 1