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Share-Based Incentive Compensation
 9 Months Ended
Sep. 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 September 30, 2020:
 
                                           Stock OptionsNumberWeighted
Average
Exercise
Price		Weighted
Average
Contractual
Life
Remaining		Aggregate
Intrinsic
Value
($ in millions)
Vested at end of period (1)
7,474,888 $114.76 5.5 years$36 
Exercisable at end of period5,210,232 $107.04 4.2 years$36 
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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 $33 million and $32 million for the three months ended September 30, 2020 and 2019, respectively, and $113 million and $112 million for the nine months ended September 30, 2020 and 2019, respectively. The related tax benefits recognized in the consolidated statement of income were $6 million for each of the three months ended September 30, 2020 and 2019, and $20 million for each of the nine months ended September 30, 2020 and 2019.

The total unrecognized compensation cost related to all nonvested share-based incentive compensation awards at September 30, 2020 was $165 million, which is expected to be recognized over a weighted-average period of 1.8 years.