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DEBT (Senior Notes Offering) (Details) - USD ($)	Jun. 30, 2020	May 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Discount	$ 11,000,000
Long-term debt	$ 4,575,000,000		$ 4,770,000,000
Senior Notes | 2.80% Senior Notes due June 2031
Debt Instrument [Line Items]
Face amount		$ 550,000,000
Debt instrument, interest rate	2.80%	2.80%
Discount		$ 1,000,000
Debt issuance costs		$ 5,000,000
Long-term debt	$ 549,000,000		0
Senior Notes | 4.70% Senior Notes due April 2021
Debt Instrument [Line Items]
Debt instrument, interest rate	4.70%
Long-term debt	$ 552,000,000		$ 554,000,000
Senior Notes | 4.70% Senior Notes due April 2021 | Plan
Debt Instrument [Line Items]
Long-term debt	$ 550,000,000

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