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Share-Based Compensation Plans (Tables) | 6 Months Ended
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Jun. 30, 2020
Share-based Payment Arrangement [Abstract] |
Amounts of Share-Based Compensation Cost Recorded in Consolidated Statement of Income | The following table provides the amounts of share-based compensation cost recorded in the Condensed Consolidated Statement of Income:
| Three Months Ended June 30, |  | Six Months Ended June 30,
($ in millions) | 2020 |  | 2019 |  | 2020 |  | 2019
Pretax share-based compensation expense | $ | 121 |  |  | $ | 111 |  |  | $ | 229 |  |  | $ | 204 |
Income tax benefit | (16 | ) |  | (15 | ) |  | (31 | ) |  | (28 | )
Total share-based compensation expense, net of taxes | $ | 105 |  |  | $ | 96 |  |  | $ | 198 |  |  | $ | 176 |
Assumptions Used to Determine Weighted-Average Fair Value of Options Granted | During the first six months of 2020, the Company granted 4 million stock options with a weighted-average exercise price of $77.67 per option and during the first six months of 2019 granted 3 million stock options with a weighted-average exercise price of $80.00 per option. The weighted-average fair value of options granted during the first six months of 2020 and 2019 was $9.93 and $10.63 per option, respectively, and was determined using the following assumptions:
| Six Months Ended June 30,
| 2020 |  | 2019
Expected dividend yield | 3.1 | % |  | 3.2 | %
Risk-free interest rate | 0.4 | % |  | 2.4 | %
Expected volatility | 22.1 | % |  | 18.7 | %
Expected life (years) | 5.8 |  |  | 5.9 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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