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Compensation Related Costs, Share Based Payments	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Share-based Payment Arrangement	NOTE 11. STOCK-BASED COMPENSATION We have stock award plans for key employees and directors, which provide for awards of stock options, SSARs, restricted stock, restricted stock units, and performance stock units are granted. In addition, we offer an employee stock purchase plan to employees. During the three months ended March 31,2021, we granted awards of 200,065 restricted stock units and 121,749 performance stock units, at an average grant date fair value of $43.39 per share. We recognized $1 million and $2 million in stock-based compensation expense for the three months ended March 31, 2021 and 2020, respectively. At March 31, 2021, there was $22 million of unrecognized stock-based compensation expense related to unvested performance stock units, restricted stock units, and SSARs attributable to future service that had not yet been recognized.

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- Definition

The entire disclosure for share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-URI http://asc.fasb.org/topic&trid=2228938

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