DEBT (Details)	9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Line of credit facility disclosures
Short-term borrowings	$ 1,500,000		$ 4,100,000
Line of credit facility, interest rate during period	27.00%
Line of credit, current	$ 322,000,000		0
Line of credit facility, description	5
Line of credit facility, interest rate at period end	1.30%
Line of credit facility, remaining borrowing capacity	$ 428,000,000		750,000,000
Line of credit, maximum amount of outstanding borrowings and letters of credit permitted at any one time	$ 750,000,000
Term of credit facility	Jun. 30, 2019
Line of credit, potential maximum with company's request and lender consent (up to)	$ 1,000,000,000
Credit Facility covenant, consolidated total debt to consolidated EBITDA ratio, numerator (cannot exceed)	3.5
Credit Facility covenant, consolidated EBITDA to consolidated interest expense ratio, numerator (cannot be less)	3.0
Description of interest rate basis	LIBOR
Credit facility, commitment fee percentage	0.125%
Debt instrument, face amount	$ 1,822,000,000		1,500,000,000
Interest rate swaps fair value adjustment	13,700,000		$ (900,000)
Long-term debt - fair value	$ 1,890,300,000
Lower limit
Line of credit facility disclosures
Range of margin added to base rate (as a percent)	0.00%
Upper limit
Line of credit facility disclosures
Range of margin added to base rate (as a percent)	1.375%
Senior Notes | 4.60% Notes due 2044
Line of credit facility disclosures
Debt instrument, face amount		$ 500,000,000
Fixed Rate Received		4.60%
Proceeds from issuance of debt		$ 492,000,000
Debt instrument, redemption price, percentage		99.465%
Senior Notes | 3.50% Notes due 2014
Line of credit facility disclosures
Fixed Rate Received		3.50%
Proceeds from issuance of debt		$ 503,500,000
Senior Notes | 4.90% Notes due 2019
Line of credit facility disclosures
Fixed Rate Received		4.90%