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LONG-TERM DEBT (Details) $ in Millions	1 Months Ended					12 Months Ended			24 Months Ended
	Aug. 31, 2020 JPY (¥) numberOfPayments	Feb. 29, 2020 USD ($)	May 31, 2017 USD ($)	May 31, 2016 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	May 31, 2017 USD ($)
Debt Instrument [Line Items]
Partially funded repurchase amount								$ 2,800
Total repurchase amount previously announced								3,000
Repayments debt						$ 1,370	$ 42	96
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net						$ 24	$ 21
Senior notes [Member]
Debt Instrument [Line Items]
Face amount of debt								$ 1,800
Debt issuance costs and discounts			$ 24						$ 24
Senior notes [Member] | Debt redemption, period one [Member]
Debt Instrument [Line Items]
Debt redemption percentage									101.00%
Senior notes [Member] | Debt redemption, period two [Member]
Debt Instrument [Line Items]
Debt redemption percentage									100.00%
Senior notes [Member] | Unsecured Senior Notes, 4.20% [Member]
Debt Instrument [Line Items]
Face amount of debt			$ 400						$ 400
Debt, term			30 years
Stated interest rate			4.20%			4.20%			4.20%
Senior notes [Member] | Unsecured Senior Notes, 3.75% [Member]
Debt Instrument [Line Items]
Face amount of debt				$ 400
Debt, term				30 years
Stated interest rate				3.75%		3.75%
Senior notes [Member] | Unsecured Senior Notes, 4.60% [Member]
Debt Instrument [Line Items]
Face amount of debt					$ 1,000
Debt, term					30 years
Stated interest rate					4.60%	4.60%
Senior notes [Member] | Unsecured Senior Notes, 1.85%
Debt Instrument [Line Items]
Face amount of debt		$ 500
Stated interest rate		1.85%				1.85%
Basis points		0.10%
Debt redemption percentage		100.00%
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net		$ 5
Japanese Yen Term Loan | Term Loan Agreement, 0.05% [Member]
Debt Instrument [Line Items]
Face amount of debt | ¥	¥ 9,000,000,000
Debt Instrument, Number Of Semi-Annual Principal Payments | numberOfPayments	4
Long-term Debt, Weighted Average Interest Rate, over Time	0.05%
Minimum | Senior notes [Member]
Debt Instrument [Line Items]
Basis points									20.00%
Maximum | Senior notes [Member]
Debt Instrument [Line Items]
Basis points									25.00%

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