DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Detail) (USD $)	1 Months Ended		12 Months Ended	3 Months Ended				3 Months Ended				1 Months Ended						12 Months Ended
	Jan. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2011 4.625% Notes due July 15, 2013		Dec. 31, 2010 4.625% Notes due July 15, 2013		Dec. 31, 2011 5.300% Notes due October 15, 2014		Dec. 31, 2010 5.300% Notes due October 15, 2014		Jan. 31, 2011 4.875% Notes due February 1, 2021	Dec. 31, 2011 4.875% Notes due February 1, 2021		Jan. 13, 2011 4.875% Notes due February 1, 2021	Dec. 31, 2010 Interest Rate Swap 4.625% Notes due July 15, 2013 Investment	Dec. 31, 2009 Interest Rate Swap 4.625% Notes due July 15, 2013 Investment	Dec. 31, 2011 Interest Rate Swap 5.300% Notes due October 15, 2014	Dec. 31, 2010 Interest Rate Swap 5.300% Notes due October 15, 2014 Investment	Dec. 31, 2009 Interest Rate Swap 5.300% Notes due October 15, 2014 Investment
Derivative [Line Items]
Fixed-rate debt, expected issuance date				On or before July 15, 2013				On or before October 15, 2014
Notes Payable		$ 1,808,825,000	$ 2,650,200,000	$ 300,000,000	[1]	$ 300,000,000	[1]	$ 275,000,000	[1]	$ 275,000,000	[1]		$ 650,000,000	[1]	$ 650,000,000
Treasury lock agreement, number of years		10 years
Number of forward-starting interest rate swaps																2	4		3	3
Treasury lock agreement, treasury rate		3.3375%
Forward-starting interest rate swaps, total aggregate notional amount		650,000,000														100,000,000	200,000,000		125,000,000	150,000,000
Treasury lock agreement, cash-settlement	500,000											500,000
Unrealized gains (losses) recorded in accumulated other comprehensive income (loss)																		(104,800,000)	(13,900,000)
Date of notes issued in an underwritten public offering													Jan. 13, 2011
Interest rate swaps, expected net losses reclassified from accumulated other comprehensive loss to earnings over the next twelve months			900,000
Unrealized gain for futures contracts designated as inventory hedging instruments			$ 200,000

[1] We make semi-annual interest payments on these notes based on the rates noted above with the principal balances outstanding to be paid on or before the due dates as shown above.