CREDIT ARRANGEMENTS (Narrative) (Details)		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 26, 2014 USD ($)	Feb. 29, 2016 USD ($)	Feb. 29, 2016 USD ($)	Feb. 28, 2015 USD ($)	Feb. 29, 2016 USD ($)	Feb. 28, 2015 USD ($)	Aug. 31, 2014	Aug. 31, 2012 USD ($)	Feb. 29, 2016 PLN	Feb. 29, 2016 USD ($)	Aug. 31, 2015 PLN	Aug. 31, 2015 USD ($)	May. 31, 2013 USD ($)	Aug. 31, 2008 USD ($)	Jul. 31, 2007 USD ($)
Debt Instrument [Line Items]
Loss on debt extinguishment			$ (11,365,000)	$ 0	$ (11,365,000)	$ 0
Net proceeds from termination of interest rate swaps								$ 52,700,000
Unamortized deferred gain on termination of interest rate swaps										$ 15,500,000		$ 19,200,000
Amortization of interest rate swaps termination gain			1,900,000	1,900,000	3,798,000	3,799,000
Interest paid			$ 31,900,000	$ 33,400,000	40,900,000	42,900,000
CMCP
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity									PLN 175,000,000	43,800,000.0	PLN 215,000,000	56,900,000.0
Total borrowing					0	41,500,000
Total payments					$ 0	$ 41,500,000
$330 million notes at 4.875% due May 2023
Debt Instrument [Line Items]
Debt instrument, face amount										$ 330,000,000		$ 330,000,000	$ 330,000,000
Debt instrument, interest rate, stated percentage									4.875%	4.875%	4.875%	4.875%	4.875%
Debt instrument, maturity date					May 15, 2023		May 15, 2023
$500 million notes at 7.35% due August 2018
Debt Instrument [Line Items]
Debt instrument, face amount										$ 500,000,000		$ 500,000,000		$ 500,000,000
Debt instrument, interest rate, stated percentage									7.35%	7.35%	7.35%	7.35%		7.35%
Debt instrument, maturity date					August 2018		August 2018
Debt instrument, effective interest rate														6.40%
Debt repurchased as a result of cash tender offer		$ 100,200,000
Loss on debt extinguishment		(6,000,000)
$400 million notes at 6.50% due July 2017
Debt Instrument [Line Items]
Debt instrument, face amount										$ 400,000,000		$ 400,000,000			$ 400,000,000
Debt instrument, interest rate, stated percentage									6.50%	6.50%	6.50%	6.50%			6.50%
Debt instrument, maturity date					July 2017		July 2017
Debt instrument, effective interest rate															5.74%
Debt repurchased as a result of cash tender offer		100,000,000
Loss on debt extinguishment		$ (5,400,000)
Revolving credit facility
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity	$ 350,000,000
Revolving credit facility, maturity date					Jun. 26, 2019
Revolving credit facility, maximum borrowing capacity	$ 500,000,000
Minimum interest coverage ratio	2.50
Maximum debt to capitalization ratio	0.60
Minimum liquidity required	$ 150,000,000
Actual interest coverage ratio									4.53	4.53
Actual debt to capitalization ratio									0.44	0.44
Revolving credit facility, amount drawn										$ 0		$ 0
Stand-by letters of credit
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity	$ 50,000,000
Stand by letters of credit outstanding amount										$ 23,500,000		$ 23,400,000