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Share-based Compensation	12 Months Ended
Share-based Compensation	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Share-based Compensation	Share-based Compensation Share-based compensation expenses are included in cost of services and products, and selling, general, and administrative expenses in our consolidated statements of operations. For the years ended December 31, 2020, 2019 and 2018, we recorded share-based compensation expense of approximately $78 million, $85 million and $105 million, respectively.