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Share-Based Incentive Compensation
 6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [Abstract]  
Share-Based Incentive Compensation SHARE-BASED INCENTIVE COMPENSATION
The following information relates to fully vested stock option awards at June 30, 2020:
 
                                           Stock OptionsNumberWeighted
Average
Exercise
Price		Weighted
Average
Contractual
Life
Remaining		Aggregate
Intrinsic
Value
($ in millions)
Vested at end of period (1)
7,488,449  $114.26  5.8 years$56  
Exercisable at end of period5,167,407  $106.08  4.5 years$56  
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(1)Represents awards for which the requisite service has been rendered, including those that are retirement eligible.

The total compensation cost for all share-based incentive compensation awards recognized in earnings was $34 million and $35 million for the three months ended June 30, 2020 and 2019, respectively, and $80 million for each of the six months ended June 30, 2020 and 2019. The related tax benefits recognized in the consolidated statement of income (loss) were $6 million for each of the three months ended June 30, 2020 and 2019, and $14 million for each of the six months ended June 30, 2020 and 2019.

The total unrecognized compensation cost related to all nonvested share-based incentive compensation awards at June 30, 2020 was $198 million, which is expected to be recognized over a weighted-average period of 2.0 years.