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DEBT (Long-Term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2020	May 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total long-term debt	$ 4,573		$ 4,770
Debt issuance costs	(29)		(26)
Less: Current portion of long-term debt	555		804
Total long-term debt, net of current portion	4,018		3,966
Other
Debt Instrument [Line Items]
Other	$ 32		34
Senior Notes \| 4.75% Senior Notes due January 2020
Debt Instrument [Line Items]
Debt instrument, interest rate	4.75%
Total long-term debt	$ 0		500
Senior Notes \| 2.50% Senior Notes due March 2020
Debt Instrument [Line Items]
Debt instrument, interest rate	2.50%
Total long-term debt	$ 0		300
Senior Notes \| 4.70% Senior Notes due April 2021
Debt Instrument [Line Items]
Debt instrument, interest rate	4.70%
Total long-term debt	$ 551		554
Senior Notes \| 4.25% Senior Notes due April 2024
Debt Instrument [Line Items]
Debt instrument, interest rate	4.25%
Total long-term debt	$ 317		308
Senior Notes \| 3.50% Senior Notes due March 2025
Debt Instrument [Line Items]
Debt instrument, interest rate	3.50%
Total long-term debt	$ 623		593
Senior Notes \| 3.45% Senior Notes due June 2026
Debt Instrument [Line Items]
Debt instrument, interest rate	3.45%
Total long-term debt	$ 513		490
Senior Notes \| 4.20% Senior Notes due June 2029
Debt Instrument [Line Items]
Debt instrument, interest rate	4.20%
Total long-term debt	$ 499		499
Senior Notes \| 2.95% Senior Notes due June 2030
Debt Instrument [Line Items]
Debt instrument, interest rate	2.95%
Total long-term debt	$ 798		798
Senior Notes \| 2.80% Senior Notes due June 2031
Debt Instrument [Line Items]
Debt instrument, interest rate	2.80%	2.80%
Total long-term debt	$ 549		0
Senior Notes \| 6.95% Senior Notes due July 2037
Debt Instrument [Line Items]
Debt instrument, interest rate	6.95%
Total long-term debt	$ 175		175
Senior Notes \| 5.75% Senior Notes due January 2040
Debt Instrument [Line Items]
Debt instrument, interest rate	5.75%
Total long-term debt	$ 245		245
Senior Notes \| 4.70% Senior Notes due March 2045
Debt Instrument [Line Items]
Debt instrument, interest rate	4.70%
Total long-term debt	$ 300		$ 300