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NOTES PAYABLE AND DEBT - Debt Outstanding (Details)	Mar. 31, 2021 USD ($)	Mar. 31, 2021 EUR (€)	Dec. 31, 2020 USD ($)	Oct. 05, 2020	Oct. 01, 2020 USD ($)
Long-term debt
Total long-term debt	$ 3,712,000,000		$ 3,742,000,000
Less: current portion	4,000,000		4,000,000
Long-term debt, net of current portion	3,708,000,000		3,738,000,000
Senior Notes
Long-term debt
Debt instrument, face amount					$ 800,000,000
Senior Notes | 1.800% Senior notes due 11/07/22 (€500 million par value)
Long-term debt
Long-term debt	$ 585,000,000		609,000,000
Debt instrument stated interest rate	1.80%	1.80%
Debt instrument, face amount | €		€ 500,000,000
Senior Notes | 3.375% Senior notes due 03/15/25 ($500 million par value)
Long-term debt
Long-term debt	$ 498,000,000		498,000,000
Debt instrument stated interest rate	3.375%	3.375%
Debt instrument, face amount	$ 500,000,000
Senior Notes | 5.000% Senior notes due 03/15/25 ($800 million par value)*
Long-term debt
Long-term debt	906,000,000		912,000,000
Debt instrument stated interest rate				5.00%
Debt instrument, face amount	800,000,000
Senior Notes | 2.650% Senior notes due 07/01/27 ($1,100 million par value)
Long-term debt
Long-term debt	$ 1,089,000,000		1,088,000,000
Debt instrument stated interest rate	2.65%	2.65%
Debt instrument, face amount	$ 1,100,000,000
Senior Notes | 7.125% Senior notes due 02/15/29 ($121 million par value)
Long-term debt
Long-term debt	$ 119,000,000		119,000,000
Debt instrument stated interest rate	7.125%	7.125%
Debt instrument, face amount	$ 121,000,000
Senior Notes | 4.375% Senior notes due 03/15/45 ($500 million par value)
Long-term debt
Long-term debt	$ 494,000,000		494,000,000
Debt instrument stated interest rate	4.375%	4.375%
Debt instrument, face amount	$ 500,000,000
Term loan | Term loan facilities, finance leases and other
Long-term debt
Long-term debt	$ 21,000,000		$ 22,000,000

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