LONG-TERM DEBT AND LINES OF CREDIT - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Finance lease liabilities	$ 30,798	$ 32,996
Total long-term debt	9,706,627	9,125,501
Less current portion	70,551	35,137
Long-term debt, excluding current portion	9,636,076	9,090,364
Senior Notes
Debt Instrument [Line Items]
Total long-term debt	6,200,000
Unsecured term loan facility
Debt Instrument [Line Items]
Gross long-term debt	1,982,763	1,981,758
Unsecured revolving credit facility
Debt Instrument [Line Items]
Gross long-term debt	1,416,000	903,000
Other borrowings
Debt Instrument [Line Items]
Gross long-term debt	111,048	33,597
3.800% senior notes due April 1, 2021 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 758,797	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	$ 566,062	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	$ 570,874	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	$ 991,844	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	$ 817,799	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	$ 485,883	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	$ 1,235,238	1,234,843
Stated interest rate (as a percent)	3.20%
4.150% senior notes due August 15, 2049 \| Senior Notes
Debt Instrument [Line Items]
Gross long-term debt	$ 739,521	$ 739,431
Stated interest rate (as a percent)	4.15%

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.

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