DEBT (Narrative) (Details) - USD ($)	1 Months Ended				3 Months Ended	6 Months Ended
	May 31, 2016	Mar. 31, 2016	Apr. 30, 2015	Mar. 31, 2015	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Debt Instrument [Line Items]
Unamortized discount						$ 14,000,000
Other Nonoperating Income (Expense) [Member]
Debt Instrument [Line Items]
Pre tax losses on extinguishment of debt					$ 65,000,000	$ 48,000,000	$ 144,000,000
3.45% Senior Notes due June 2026 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 500,000,000
Unamortized discount	1,000,000
Debt issuance cost	$ 4,000,000
Debt instrument, interest rate						3.45%
6.95% Senior Notes due July 2037 and 5.75% Senior Notes due January 2040 [Member]
Debt Instrument [Line Items]
Extinguishment of debt, amount		$ 200,000,000		$ 250,000,000
6.95% Senior Notes Due 2037 [Member]
Debt Instrument [Line Items]
Extinguishment of debt, amount		73,000,000		176,000,000
Debt instrument, interest rate						6.95%
5.75% Senior Notes Due 2040 [Member]
Debt Instrument [Line Items]
Extinguishment of debt, amount		$ 127,000,000		$ 74,000,000
Debt instrument, interest rate						5.75%
5.45% Senior Notes Due 2015 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			5.45%
3.20% Senior Notes Due 2016 [Member]
Debt Instrument [Line Items]
Extinguishment of debt, amount			$ 150,000,000
Debt instrument, interest rate						3.20%
6.40% Senior Notes Due 2017 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			6.40%