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Cash-Based Compensation Plans	12 Months Ended
Cash-Based Compensation Plans	Dec. 31, 2018
Compensation Related Costs [Abstract]
Cash-Based Compensation Plans	Cash-Based Compensation Plans Various incentive plans provide for cash incentives and bonuses to selected employees based upon accomplishment of corporate net income objectives, goals of the reporting segments and support functions, and individual performance. The provision for awards under these plans is charged to compensation expense and totaled $326.5 million in 2018, $289.8 million in 2017, and $250.7 million in 2016.