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Net Income Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Basic And Diluted Net Income Per Common Share | Basic and diluted net income per common share are presented in the following table.
(in millions, except per share data) |  |  |  |  |
Years Ended December 31 | 2021 |  | 2020 |  | 2019
Basic and diluted |  |  |  |  |
Net income | $ | 1,168 |  |  | $ | 497 |  |  | $ | 1,202 |
Less: |  |  |  |  |
Income allocated to participating securities | 5 |  |  | 2 |  |  | 7 |
Preferred stock dividends | 23 |  |  | 13 |  |  | — |
Net income attributable to common shares | $ | 1,140 |  |  | $ | 482 |  |  | $ | 1,195 |
Basic average common shares | 135 |  |  | 139 |  |  | 150 |
Basic net income per common share | $ | 8.45 |  |  | $ | 3.45 |  |  | $ | 7.98 |
Basic average common shares | 135 |  |  | 139 |  |  | 150 |
Dilutive common stock equivalents: |  |  |  |  |
Net effect of the assumed exercise of stock awards | 2 |  |  | 1 |  |  | 1 |
Diluted average common shares | 137 |  |  | 140 |  |  | 151 |
Diluted net income per common share | $ | 8.35 |  |  | $ | 3.43 |  |  | $ | 7.90 |
Schedule of Average Shares Excluded From Diluted Net Income Per Common Share Computation | The following average shares related to outstanding options to purchase shares of common stock were not included in the computation of diluted net income per common share because the options were anti-dilutive for the period.
(average outstanding options in thousands) |  |  |  |  |
Years Ended December 31 | 2021 |  | 2020 |  | 2019 |  |
Average outstanding options | 438 |  | 1,498 |  | 543 |  |
Range of exercise prices | $79.01 - $95.25 |  | $49.20 - $95.25 |  | $67.53 - $95.25 |  |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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