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LONG-TERM DEBT AND LINES OF CREDIT - Summary (Details) - USD ($) $ in Thousands	Jun. 30, 2020	May 15, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Finance lease liabilities	$ 47,140		$ 32,996
Total long-term debt	9,273,601		9,125,501
Less current portion	833,334		35,137
Long-term debt, excluding current portion	8,440,267		9,090,364
Senior Notes
Debt Instrument [Line Items]
Total long-term debt	7,100,000
Unsecured term loan facility
Debt Instrument [Line Items]
Gross long-term debt	1,983,767		1,981,758
Unsecured revolving credit facility
Debt Instrument [Line Items]
Gross long-term debt	0		903,000
Other borrowings
Debt Instrument [Line Items]
Gross long-term debt	96,400		33,597
3.800% senior notes due April 1, 2021 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 756,597		760,996
Stated interest rate (as a percent)	3.80%
3.750% senior notes due June 1, 2023 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 564,794		567,330
Stated interest rate (as a percent)	3.75%
4.000% senior notes due June 1, 2023 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 569,226		572,522
Stated interest rate (as a percent)	4.00%
2.650% senior notes due February 15, 2025 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 992,266		991,423
Stated interest rate (as a percent)	2.65%
4.800% senior notes due April 1, 2026 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 814,974		820,623
Stated interest rate (as a percent)	4.80%
4.450% senior notes due June 1, 2028 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 484,785		486,982
Stated interest rate (as a percent)	4.45%
3.200% senior notes due August 15, 2029 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 1,235,634		1,234,843
Stated interest rate (as a percent)	3.20%
2.900% senior notes due May 15, 2030 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 988,408		0
Stated interest rate (as a percent)	2.90%	2.90%
4.150% senior notes due August 15, 2049 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 739,610		$ 739,431
Stated interest rate (as a percent)	4.15%