INCOME TAXES (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Income tax expense (benefit):
Effective tax rate on pretax income from continuing operations (as a percent)	25.00%	17.30%
U.S. federal income tax at statutory rate (as a percent)	35.00%	35.00%
Deferred tax asset valuation allowance	$ 190,000,000
Deferred tax asset valuation allowance allocated to income from continuing operations	183,000,000
Accounting for Uncertainty in Income Taxes
Unrecognized tax benefits, excluding interest and penalties	4,200,000,000		4,300,000,000
Unrecognized tax benefits, if recognized would not affect the effective tax rate	700,000,000		700,000,000
Unrecognized tax benefits, if recognized would favorably affect the effective tax rate	3,500,000,000		3,600,000,000
Unrecognized tax benefits, interest and penalties accrued	707,000,000		744,000,000
Unrecognized tax benefits, interest net of the federal benefit and penalties	$ 37,000,000		$ 35,000,000
Unrecognized tax benefits, period of reasonably possible change in balance (in months)	P12M