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Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2019
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans We have defined contribution retirement plans covering the majority of our employees. We recognized $25 million, $22 million and $20 million in compensation expense for 2019, 2018 and 2017 related to these plans. Contributions to the plans were made in cash.