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Depreciation and Amortization
3 Months Ended
Mar. 31, 2020
Depreciation, Depletion and Amortization [Abstract]  
Depreciation and Amortization DEPRECIATION AND AMORTIZATION
 
Depreciation and amortization expense, including discontinued operations, was $33 million and $40 million for the three-month periods ended March 31, 2020 and 2019, respectively.