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Share-based Compensation	12 Months Ended
Share-based Compensation	Dec. 31, 2019
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, 2019, 2018 and 2017, we recorded share-based compensation expense of approximately $26 million, $24 million and $27 million, respectively. We recognized an income tax benefit from our compensation expense of approximately $6 million, $6 million and $7 million during the years ended December 31, 2019, 2018 and 2017, respectively.