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Coworker Retirement and Other Compensation Benefits	12 Months Ended
Coworker Retirement and Other Compensation Benefits	Dec. 31, 2018
Compensation Related Costs [Abstract]
Coworker Retirement and Other Compensation Benefits	Coworker Retirement and Other Compensation Benefits Profit Sharing Plan and Other Savings Plans The Company has a profit sharing plan that includes a salary reduction feature established under the Internal Revenue Code Section 401(k) covering substantially all coworkers in the US. In addition, coworkers outside the US participate in other savings plans. Company contributions to the profit sharing and other savings plans are made in cash and determined at the discretion of the Board of Directors. For the years ended December 31, 2018, 2017 and 2016, the amounts expensed for these plans were $34 million, $20 million and $23 million, respectively. Coworker Stock Purchase Plan The Company has a Coworker Stock Purchase Plan (the "CSPP") that provides the opportunity for eligible coworkers to acquire shares of the Company's common stock at a 5% discount from the closing market price on the final day of the offering period. There is no compensation expense associated with the CSPP.