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Earnings per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Basic and Diluted Earnings per Common Share | Table 70: Basic and Diluted Earnings Per Common Share
|  | Three months ended June 30 |  | Six months ended June 30 |
In millions, except per share data |  | 2021 |  | 2020 |  | 2021 |  | 2020 |
Basic |  |  |  |  |  |  |  |  |
Net income (loss) from continuing operations |  | $ | 1,103 |  |  | $ | (744) |  |  | $ | 2,929 |  |  | $ | 15 |  |
Less: |  |  |  |  |  |  |  |  |
Net income attributable to noncontrolling interests |  | 12 |  |  | 7 |  |  | 22 |  |  | 14 |  |
Preferred stock dividends |  | 48 |  |  | 55 |  |  | 105 |  |  | 118 |  |
Preferred stock discount accretion and redemptions |  | 1 |  |  | 1 |  |  | 2 |  |  | 2 |  |
Net income (loss) from continuing operations attributable to common shareholders |  | 1,042 |  |  | (807) |  |  | 2,800 |  |  | (119) |  |
Less: Dividends and undistributed earnings allocated to nonvested restricted shares |  | 5 |  |  | 1 |  |  | 13 |  |  | 4 |  |
Net income (loss) from continuing operations attributable to basic common shareholders |  | $ | 1,037 |  |  | $ | (808) |  |  | $ | 2,787 |  |  | $ | (123) |  |
Net income from discontinued operations attributable to common shareholders |  |  |  | $ | 4,399 |  |  |  |  | $ | 4,555 |  |
Less: Undistributed earnings allocated to nonvested restricted shares |  |  |  | 21 |  |  |  |  | 22 |  |
Net income from discontinued operations attributable to basic common shareholders |  |  |  | $ | 4,378 |  |  |  |  | $ | 4,533 |  |
Basic weighted-average common shares outstanding |  | 427 |  |  | 426 |  |  | 426 |  |  | 428 |  |
Basic earnings (loss) per common share from continuing operations (a) |  | $ | 2.43 |  |  | $ | (1.90) |  |  | $ | 6.54 |  |  | $ | (0.29) |  |
Basic earnings per common share from discontinued operations (a) |  |  |  | $ | 10.28 |  |  |  |  | $ | 10.60 |  |
Basic earnings per common share (b) |  | $ | 2.43 |  |  | $ | 8.40 |  |  | $ | 6.54 |  |  | $ | 10.33 |  |
Diluted |  |  |  |  |  |  |  |  |
Net income (loss) from continuing operations attributable to diluted common shareholders |  | $ | 1,037 |  |  | $ | (808) |  |  | $ | 2,787 |  |  | $ | (123) |  |
Net income from discontinued operations attributable to basic common shareholders |  |  |  | $ | 4,378 |  |  |  |  | $ | 4,533 |  |
Less: Impact of earnings per share dilution from discontinued operations |  |  |  | 1 |  |  |  |  | 2 |  |
Net income from discontinued operations attributable to diluted common shareholders |  |  |  | $ | 4,377 |  |  |  |  | $ | 4,531 |  |
Basic weighted-average common shares outstanding |  | 427 |  |  | 426 |  | 426 |  |  | 428 |
Dilutive potential common shares (c) |  |  |  |  |  | 1 |  |  |  |
Diluted weighted-average common shares outstanding |  | 427 |  |  | 426 |  |  | 427 |  |  | 428 |  |
Diluted earnings (loss) per common share from continuing operations (a) |  | $ | 2.43 |  |  | $ | (1.90) |  |  | $ | 6.53 |  |  | $ | (0.29) |  |
Diluted earnings per common share from discontinued operations (a) |  |  |  | $ | 10.28 |  |  |  |  | $ | 10.59 |  |
Diluted earnings per common share (b) |  | $ | 2.43 |  |  | $ | 8.40 |  |  | $ | 6.53 |  |  | $ | 10.32 |  |
(a)Basic and diluted earnings per share under the two-class method are determined on net income reported on the income statement less earnings allocated to nonvested restricted shares and restricted share units with nonforfeitable dividends and dividend rights (participating securities). (b)For additional information on our policy for not allocating losses to participating securities, see the Earnings Per Common Share section of Note 1 Accounting Policies included in Item 8 of our 2020 Form 10-K. (c)For periods in which there is a loss from continuing operations, any potential dilutive shares will be anti-dilutive. No potential dilutive shares will be included in the continuing operations, discontinued operations or total earnings per common share calculations, even if overall net income is reported.

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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=6371337&loc=d3e3550-109257 + Details
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