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BENEFIT PLANS
12 Months Ended
Dec. 31, 2019
Retirement Benefits [Abstract]  
BENEFIT PLANS
BENEFIT PLANS
 
The Company maintains a defined contribution 401(k) savings plan (the "Plan") covering certain U.S. employees. In connection with acquisitions, effective at the date of such acquisitions, the Company assumed defined contribution plans covering the U.S. employees of the acquired companies. The Company also maintains certain other defined contribution plans outside of the United States for which it provides contributions for participating employees.  The Company's matching contributions during the years ended December 31, 2019, 2018 and 2017 were $26 million, $22 million and $15 million, respectively.