STOCK PLANS (Details) (USD $) In Millions, except Share data, unless otherwise specified		12 Months Ended
	Dec. 31, 2011 plan	Dec. 31, 2011 Stock options Y	Dec. 31, 2011 Stock options Low end of range	Dec. 31, 2011 Stock options High end of range	Dec. 31, 2005 2005 Performance-based restricted stock awards Key employees	Dec. 31, 2007 2007 Performance-based restricted stock awards Key employees	Dec. 31, 2011 2007 Performance-based restricted stock awards Key employees Initial performance-based award vesting One-fifth per year.	Dec. 31, 2011 2007 Performance-based restricted stock awards Key employees Incremental performance-based award vesting One-fifth per year.	Dec. 31, 2011 2007 Performance-based restricted stock awards Key employees Performance-based award full vesting	Dec. 31, 2008 2008 Performance-based restricted stock awards Key employees One-fifth per year.	Dec. 31, 2011 2008 Performance-based restricted stock awards Key employees Initial performance-based award vesting One-fifth per year.	Dec. 31, 2011 2008 Performance-based restricted stock awards Key employees Incremental performance-based award vesting One-fifth per year.	Dec. 31, 2011 2008 Performance-based restricted stock awards Key employees Performance-based award full vesting	Dec. 31, 2011 Time-based and performance-based restricted stock awards	Dec. 31, 2008 Time-based and performance-based restricted stock awards Key employees	Dec. 31, 2011 Time-based restricted stock awards One-third per year.	Dec. 31, 2010 Time-based restricted stock awards Board of Directors	Dec. 31, 2009 Time-based restricted stock awards Board of Directors	Dec. 31, 2010 Time-based restricted stock awards Key employees	Dec. 31, 2009 Time-based restricted stock awards Key employees	Dec. 31, 2008 Time-based restricted stock awards Key employees One-third per year.	Dec. 31, 2008 Time-based restricted stock awards Key employees One-fifth per year.	Dec. 31, 2011 2011 Performance-based restricted stock awards One-third per year.	Dec. 31, 2011 2011 Performance-based restricted stock awards Initial performance-based award vesting One-third per year.	Dec. 31, 2011 2011 Performance-based restricted stock awards Incremental performance-based award vesting One-third per year.	Dec. 31, 2011 2007 Stock Incentive Plan	May 31, 2007 2007 Stock Incentive Plan	Dec. 31, 2011 2010 Stock Incentive Plan	May 31, 2010 2010 Stock Incentive Plan
Stock Plans
Number of Stock Incentive Plans	2
Shares authorized for issuance																											2,000,000		2,000,000
Shares available for issuance																										100,774		1,979,000
Maximum contractual life (in years)			P7Y	P10Y
Period from date of award agreement for partial vesting of grants (in years)		1
Vesting percentage per year of options granted		25.00%
Period over which options vest (in years)		4														3	3	3	3	4	3
Amount of operating profit for vesting of shares							$ 141.0	$ 15.0	$ 201.0		$ 156.0	$ 15.0	$ 216.0											$ 77.0	$ 92.0
Grants in period (in shares)					1,650,000	360,000				66,000				762,004	992,117	14,004	25,446	40,818	25,000	935,000	26,117	900,000	748,000
Portion of shares vested							one-fifth	one-fifth			one-fifth	one-fifth				one-third	one-third	one-third	one-third		one-third	one-fifth		one-third	one-third