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Earnings (Loss) Per Common Share | 12 Months Ended
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Dec. 31, 2022
Earnings Per Share [Abstract] |
Earnings (Loss) Per Common Share | Earnings (Loss) Per Common Share Basic and diluted earnings (loss) per common share for the years ended December 31, 2022, 2021 and 2020 were calculated as follows:
| Years Ended December 31,
| 2022 |  | 2021 |  | 2020
| (Dollars in millions, except per share amounts, shares in thousands)
(Loss) income (numerator) |  |  |  |  |
Net (loss) income | $ | (1,548) |  |  | 2,033 |  |  | (1,232) |
Net (loss) income applicable to common stock for computing basic (loss) earnings per common share | (1,548) |  |  | 2,033 |  |  | (1,232) |
Net (loss) income as adjusted for purposes of computing diluted (loss) earnings per common share | $ | (1,548) |  |  | 2,033 |  |  | (1,232) |
Shares (denominator): |  |  |  |  |
Weighted average number of shares: |  |  |  |  |
Outstanding during period | 1,028,069 |  |  | 1,077,393 |  |  | 1,096,284 |
Non-vested restricted stock | (20,552) |  |  | (17,852) |  |  | (17,154) |
Weighted average shares outstanding for computing basic (loss) earnings per common share | 1,007,517 |  |  | 1,059,541 |  |  | 1,079,130 |
Incremental common shares attributable to dilutive securities: |  |  |  |  |
Shares issuable under convertible securities | — |  |  | 10 |  |  | — |
Shares issuable under incentive compensation plans | — |  |  | 7,227 |  |  | — |
Number of shares as adjusted for purposes of computing diluted (loss) earnings per common share | 1,007,517 |  |  | 1,066,778 |  |  | 1,079,130 |
Basic (loss) earnings per common share | $ | (1.54) |  |  | 1.92 |  |  | (1.14) |
Diluted earnings (loss) per common share(1) | $ | (1.54) |  |  | 1.91 |  |  | (1.14) |
______________________________________________________________________________ (1)For the years ended December 31, 2022 and December 31, 2020, we excluded from the calculation of diluted loss per share 3.8 million and 5.3 million shares, respectively, potentially issuable under incentive compensation plans or convertible securities, as their effect, if included, would have been anti-dilutive. Our calculation of diluted (loss) earnings per common share excludes shares of common stock that are issuable upon exercise of stock options when the exercise price is greater than the average market price of our common stock. We also exclude unvested restricted stock awards that are antidilutive as a result of unrecognized compensation cost. Such shares were 13.8 million, 3.2 million and 3.2 million for 2022, 2021 and 2020, respectively.

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