DEBT - Summary of Information Related to Other Senior Notes Outstanding (Details) - Senior Notes	Mar. 31, 2021	Dec. 31, 2020	Apr. 30, 2020	Aug. 31, 2017	Mar. 31, 2017	May 31, 2016	Nov. 30, 2015	Mar. 31, 2015	Sep. 30, 2014
0.8% (€1 billion) Senior Notes due March 2022
Debt Instrument
Stated interest rate		0.80%			0.80%
Effective interest rate at debt origination					0.94%
2.15% (€750 million) Senior Notes due November 2022
Debt Instrument
Stated interest rate	2.15%	2.15%					2.15%
Effective interest rate at debt origination							2.27%
2.75% Senior Notes due March 2023
Debt Instrument
Stated interest rate	2.75%	2.75%		2.75%
Effective interest rate at debt origination				2.88%
2.375% (€1 billion) Senior Notes due September 2024
Debt Instrument
Stated interest rate	2.375%	2.375%							2.375%
Effective interest rate at debt origination									2.54%
3.65% Senior Notes due March 2025
Debt Instrument
Stated interest rate	3.65%	3.65%						3.65%
Effective interest rate at debt origination								3.76%
0.1% (€950 million) Senior Notes due March 2025
Debt Instrument
Stated interest rate	0.10%
Effective interest rate at debt origination	0.30%
4.1% Senior Notes due April 2025
Debt Instrument
Stated interest rate		4.10%	4.10%
Effective interest rate at debt origination			4.22%
3.6% Senior Notes due June 2026
Debt Instrument
Stated interest rate	3.60%	3.60%				3.60%
Effective interest rate at debt origination						3.70%
1.8% (€1 billion) Senior Notes due March 2027
Debt Instrument
Stated interest rate	1.80%	1.80%						1.80%
Effective interest rate at debt origination								1.86%
4.5% Senior Notes due April 2027
Debt Instrument
Stated interest rate		4.50%	4.50%
Effective interest rate at debt origination			4.63%
3.55% Senior Notes due March 2028
Debt Instrument
Stated interest rate	3.55%	3.55%		3.55%
Effective interest rate at debt origination				3.63%
0.5% (€750 million) Senior Notes due March 2028
Debt Instrument
Stated interest rate	0.50%
Effective interest rate at debt origination	0.63%
4.625% Senior Notes due April 2030
Debt Instrument
Stated interest rate	4.625%	4.625%	4.625%
Effective interest rate at debt origination			4.72%