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DEBT - Notes and Debentures (Details) - USD ($) $ in Millions					12 Months Ended
	Sep. 29, 2020	Sep. 18, 2020	Dec. 19, 2019	Apr. 16, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt
Repayments of notes payable					$ 400	$ 201	$ 114
7.750%, due August 1, 2029 | Senior notes and debentures
Debt
Interest rate (as a percent)					7.75%
2.000%, due October 1, 2030
Debt
Interest rate (as a percent)		2.00%
Long-term debt, gross		$ 300
Proceeds from issuance of debt		300
2.000%, due October 1, 2030 | Senior notes and debentures
Debt
Interest rate (as a percent)					2.00%
4.500%, due May 15, 2047
Debt
Interest rate (as a percent)					4.50%	4.50%
Long-term debt, gross		100				$ 300
Proceeds from issuance of debt		$ 119
4.500%, due May 15, 2047 | Senior notes and debentures
Debt
Interest rate (as a percent)					4.50%
3.500%, due April 1, 2021
Debt
Interest rate (as a percent)	3.50%
Repayments of notes payable	$ 400
Debt extinguishment costs	$ 6
3.500%, due April 1, 2021 | Senior notes and debentures
Debt
Interest rate (as a percent)					3.50%
7.125% Notes and Debentures Due 15 March 2020
Debt
Debt extinguishment costs			$ 2
7.125% Notes and Debentures Due 15 March 2020 | Senior notes and debentures
Debt
Interest rate (as a percent)			7.125%
Repayments of notes payable			$ 201
6.625% Notes and Debentures Due 15 April 2018
Debt
Interest rate (as a percent)				6.625%
Repayments of notes payable				$ 114

X

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
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X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The cash outflow for a borrowing supported by a written promise to pay an obligation.

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