DEBT (Tables)

12 Months Ended

Dec. 31, 2020

Debt Instruments [Abstract]

Long-term Debt

Long-term debt (including finance lease obligations) as of December 31, 2020 and 2019 consisted of the following:

	2020		2019
4.75% Senior Notes due January 2020	$	—	$	500
2.50% Senior Notes due March 2020	—		300
4.70% Senior Notes due April 2021	—		554
4.25% Senior Notes due April 2024	316		308
3.50% Senior Notes due March 2025	622		593
3.45% Senior Notes due June 2026	512		490
4.20% Senior Notes due June 2029	499		499
2.95% Senior Notes due June 2030	798		798
2.80% Senior Notes due June 2031	549		—
6.95% Senior Notes due July 2037	175		175
5.75% Senior Notes due January 2040	245		245
4.70% Senior Notes due March 2045	300		300
Other	27		34
Debt issuance costs	(28)		(26)
Total long-term debt	4,015		4,770
Less: Current portion of long-term debt	2		804
Total long-term debt, net of current portion	$	4,013	$	3,966

Schedule of Leverage Ratio Covenants

As amended, the leverage ratio covenant (as defined in the Credit Facility) was increased as follows:

As of:	Applicable Covenant:
December 31, 2020	no more than 6.5 times EBITDA
March 31, 2021	no more than 6.25 times EBITDA
June 30, 2021	no more than 4.5 times EBITDA

Schedule of Maturities of Long-term Debt

As of December 31, 2020, long-term debt matures as follows:

Year Ending December 31,
2021	$	2
2022	1
2023	1
2024	302
2025	602
Thereafter	3,095
Total maturities of long-term debt	4,003
Unamortized discount	(11)
Debt issuance costs	(28)
Fair value basis adjustments attributable to hedged debt	51
Total long-term debt	4,015
Less: Current portion of long-term debt	2
Total long-term debt, net of current portion	$	4,013