SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2011 Y	Dec. 31, 2010	Dec. 31, 2009
Property and equipment
Depreciation expense	$ 203,100,000	$ 191,600,000	$ 150,800,000
Interest costs which are capitalized during the construction of major capital projects	100,000	0	1,100,000
Finite intangible assets, estimated useful lives, low end of range (in years)	1
Finite intangible assets, estimated useful lives, high end of range (in years)	30
Other liabilities and deferred credits
Non-current pension and other postretirement liability	243,400,000	157,800,000
Treasury stock
Purchase of shares of common stock	5,000,000	1,531,200
Value of shares purchased of common stock	161,081,000	45,759,000
Remaining common shares, authorized to be repurchased	4,500,000
Land improvements
Property and equipment
Plant and equipment, estimated useful lives, low end of range (in years)	15
Plant and equipment, estimated useful lives, high end of range (in years)	30
Buildings
Property and equipment
Plant and equipment, estimated useful lives, low end of range (in years)	15
Plant and equipment, estimated useful lives, high end of range (in years)	45
Leasehold and building improvements
Property and equipment
Plant and equipment, estimated useful lives, low end of range (in years)	8
Plant and equipment, estimated useful lives, high end of range (in years)	20
Machinery and equipment
Property and equipment
Plant and equipment, estimated useful lives, low end of range (in years)	3
Plant and equipment, estimated useful lives, high end of range (in years)	16
Internal-use-software
Property and equipment
Plant and equipment, estimated useful lives, low end of range (in years)	3
Plant and equipment, estimated useful lives, high end of range (in years)	12
ERP system capitalized software development costs
Property and equipment
Capitalized costs for new ERP system	$ 87,000,000	$ 85,000,000