SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) (USD $) In Millions, unless otherwise specified		12 Months Ended
	Dec. 31, 2012 Successor	Dec. 31, 2011 Predecessor	Dec. 31, 2010 Predecessor
Beginning balance	$ 0	$ 1	$ 1
Additions: charged (credited) to expense		0	0
Deductions: write-off of uncollectible accounts		0	0
Other		0	0
Ending balance	$ 0	$ 1	$ 1