THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Adoption of ASU 2020-06 (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		12 Months Ended
	Jan. 01, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Statement of operations impacts for the three months ended March 31, 2020
Interest expense	$ 31,894	$ 31,838	$ 31,894
Income tax benefit	(48,202)	17,747	48,202
Net earnings from continuing operations	$ 157,534	$ 173,848	$ 157,534
Net earnings per share from continuing operations:
Basic (USD per share)	$ 0.69	$ 0.65	$ 0.69
Diluted (USD per share)	$ 0.61	$ 0.57	$ 0.61
Weighted average dilutive shares outstanding (shares)	204,658	310,585	204,658
Balance sheet impacts at December 31, 2020:
Non-current deferred tax asset	$ 292,820	$ 302,688		$ 292,820
Long-term debt, net	3,840,930	3,843,244		3,840,930
Additional paid-in capital	7,089,007
Retained deficit	(8,422,904)	(8,248,654)		(8,422,904)
Adjustment from adoption of ASU		(1,213,574)	$ 3,192,110	(1,414,042)	$ 3,627,394
Additional Paid-in Capital
Balance sheet impacts at December 31, 2020:
Adjustment from adoption of ASU		7,135,823	11,106,503	7,089,007	11,378,160
Retained Deficit
Balance sheet impacts at December 31, 2020:
Adjustment from adoption of ASU		$ (8,248,654)	$ 1,521,810	(8,422,904)	1,724,640
Accounting Standards Update 2020-06 | Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-in Capital
Balance sheet impacts at December 31, 2020:
Adjustment from adoption of ASU					305,600
Accounting Standards Update 2020-06 | Cumulative Effect, Period of Adoption, Adjustment | Retained Deficit
Balance sheet impacts at December 31, 2020:
Adjustment from adoption of ASU					$ 34,700
Previously Reported
Statement of operations impacts for the three months ended March 31, 2020
Interest expense				42,649
Income tax benefit				(50,747)
Net earnings from continuing operations				$ 149,324
Net earnings per share from continuing operations:
Basic (USD per share)				$ 0.65
Diluted (USD per share)				$ 0.59
Weighted average dilutive shares outstanding (shares)				191,259
Balance sheet impacts at December 31, 2020:
Non-current deferred tax asset				$ 224,013
Long-term debt, net				3,534,706
Additional paid-in capital				7,394,646
Retained deficit				$ (8,491,126)
Revision of Prior Period, Accounting Standards Update, Adjustment | Accounting Standards Update 2020-06
Statement of operations impacts for the three months ended March 31, 2020
Interest expense	(10,755)
Income tax benefit	2,545
Net earnings from continuing operations	$ 8,210
Net earnings per share from continuing operations:
Basic (USD per share)	$ 0.04
Diluted (USD per share)	$ 0.02
Weighted average dilutive shares outstanding (shares)	13,399
Balance sheet impacts at December 31, 2020:
Non-current deferred tax asset	$ 68,807
Long-term debt, net	306,224
Additional paid-in capital	(305,639)
Retained deficit	$ 68,222