DEBT (Narrative) (Details) $ in Thousands	1 Months Ended			3 Months Ended	6 Months Ended
	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	May 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2021 USD ($) item	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Discounts and debt issuance costs					$ 11,380	$ 3,126
Total long-term debt - face value		$ 3,355,341		$ 2,857,458	2,857,458	3,355,341	$ 3,357,899
Financing costs		69,669		72,130	72,130	69,669	70,224
Net proceeds			$ 741,417
Repayment of long-term debt					500,013	250,012
Short-term debt		0		0	0	0	0
Delayed Draw Term Loan Expires 2024 [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity				1,600,000	$ 1,600,000
Commitment fee					0.10%
Delayed Draw Term Loan Expires 2024 [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					1.00%
Delayed Draw Term Loan Expires 2024 [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					0.00%
Investment-Grade Type Covenants Governed [Member]
Debt Instrument [Line Items]
Number of indentures with customary investment-grade type covenants | item					3
Bridge Facility And Delayed Draw Term Loan [Member]
Debt Instrument [Line Items]
Discounts and debt issuance costs				9,384
Financing costs				13,316	$ 13,316
Line of Credit [Member]
Debt Instrument [Line Items]
Transaction fees	$ 4,632
Maximum borrowing capacity	$ 1,000,000			1,000,000	$ 1,000,000
Commitment fee					0.10%
Available borrowing capacity				942,715	$ 942,715
Debt issued, term	5 years
Line of Credit [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					1.125%
Line of Credit [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					0.125%
Line of Credit [Member] | Delayed Draw Term Loan And Line Of Credit [Member]
Debt Instrument [Line Items]
Short-term debt				0	$ 0
Bridge Facility [Member]
Debt Instrument [Line Items]
Face value				2,200,000	2,200,000
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Outstanding standby letters of credit				57,285	$ 57,285
Period of standby letters of credit					1 year
Standby Letters of Credit [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					0.175%
Maximum [Member] | Delayed Draw Term Loan Expires 2024 [Member]
Debt Instrument [Line Items]
Commitment fee					0.225%
Maximum [Member] | Delayed Draw Term Loan Expires 2024 [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					1.375%
Maximum [Member] | Delayed Draw Term Loan Expires 2024 [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					0.375%
Maximum [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Commitment fee					0.225%
Maximum [Member] | Line of Credit [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					1.625%
Maximum [Member] | Line of Credit [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					0.625%
Minimum [Member] | Delayed Draw Term Loan Expires 2024 [Member]
Debt Instrument [Line Items]
Commitment fee					0.09%
Minimum [Member] | Delayed Draw Term Loan Expires 2024 [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					0.875%
Minimum [Member] | Delayed Draw Term Loan Expires 2024 [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					0.00%
Minimum [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Commitment fee					0.09%
Minimum [Member] | Line of Credit [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					1.00%
Minimum [Member] | Line of Credit [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Applicable margin on borrowing rate					0.00%
Term Loan Due [Member] | Delayed Draw Term Loan Expires 2024 [Member]
Debt Instrument [Line Items]
Total long-term debt - face value		0		0	$ 0	0	0
Maturity year					2024
Notes [Member]
Debt Instrument [Line Items]
Total long-term debt - face value				2,857,458	$ 2,857,458
Notes [Member] | Investment-Grade Type Covenants Governed [Member]
Debt Instrument [Line Items]
Total long-term debt - face value				2,846,188	2,846,188
Notes [Member] | 3.50% notes due 2030 [Member]
Debt Instrument [Line Items]
Total long-term debt - face value		750,000	$ 750,000	$ 750,000	$ 750,000	750,000	750,000
Maturity year			2030		2030
Interest rate			3.50%	3.50%	3.50%
Notes [Member] | Floating-Rate Notes Due 2020 [Member]
Debt Instrument [Line Items]
Total long-term debt - face value			$ 250,000
Maturity year					2020
Repayment of long-term debt		250,000
Notes [Member] | Floating-Rate Notes Due 2021 [Member]
Debt Instrument [Line Items]
Total long-term debt - face value		$ 500,000		$ 0	$ 0	$ 500,000	$ 500,000
Maturity year					2021
Face value				$ 500,000	$ 500,000