ESTIMATES, SIGNIFICANT ACCOUNTING POLICIES AND BALANCE SHEET DETAIL ESTIMATES, SIGNIFICANT ACCT. POLICIES AND BALANCE SHEET DETAIL - Allowance Roll (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Valuation and Qualifying Accounts Disclosure [Line Items]
Allowance for Doubtful Accounts Receivable, Current	$ 2	$ 3	$ 2
Valuation Allowances and Reserves, Charged to Cost and Expense	8	9
Valuation Allowances and Reserves, Deductions	(11)	(8)
Valuation Allowances and Reserves, Charged to Other Accounts	$ 2	$ 0