FAIR VALUE OF FINANCIAL INSTRUMENTS (Interest Rate Swap) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended
	Sep. 30, 2013	Mar. 31, 2013 3.85% Senior notes due 2025 [Member]	Sep. 30, 2013 3.85% Senior notes due 2025 [Member]	Mar. 31, 2013 4.05% Senior notes due 2028 [Member]	Sep. 30, 2013 4.05% Senior notes due 2028 [Member]	Jan. 31, 2012 4.24% Senior notes due 2026 [Member]	Sep. 30, 2013 4.24% Senior notes due 2026 [Member]	Jan. 31, 2012 3.84% Senior notes due 2021 [Member]	Sep. 30, 2013 3.84% Senior notes due 2021 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Issuance date	Feb. 26, 2013		Mar. 01, 2013		Mar. 01, 2013		Jan. 01, 2012		Jan. 01, 2012
Notional amount	$ 400	$ 100		$ 75		$ 200		$ 25
Interest rate		3.85%		4.05%		4.24%		3.84%
Maturity date			Feb. 26, 2025		Feb. 26, 2028		Dec. 01, 2026		Dec. 01, 2021
Variable rate basis		LIBOR		LIBOR		LIBOR		LIBOR
Basis spread on variable rate		1.77%		1.73%		2.02%		1.90%
Face amount								$ 100