LITIGATION (Details) (USD $)	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2012 M	Dec. 31, 2011	Jun. 30, 2012 HHC	Dec. 31, 2011 Homart Note	Jun. 22, 2011 Homart Note	Jun. 30, 2012 2006 Credit Facility	Dec. 31, 2011 2006 Credit Facility
Default Interest
Principal amount outstanding				$ 254,000,000			$ 2,580,000,000
Outstanding default interest and principal amount					246,000,000
Default interest expense				11,700,000
Default interest accrued						93,800,000	91,500,000
Tax Indemnification Liability
Successor indemnified percentage of losses of HHC and its subsidiaries			93.75%
Maximum amount indemnified, solely to the extent directly attributable to MPC Taxes			303,800,000
Tax indemnification liability	303,750,000	303,750,000
Accrued interest related to tax indemnification liability	21,600,000	21,600,000
Management's best estimate of aggregate liability	$ 325,400,000
Period during which the entity does not expect to make any payments on tax indemnification liability (in months)	12