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Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Summary Of Significant Accounting Policies [Abstract] |
Net Income (Loss) Per Common Share | Years Ended December 31, (Amounts in millions, except per share amounts) 2022 2021 2020 Net income (loss) per share: Numerator Net income (loss) $ 597 $ 1,379 $ 514 Less: dividends declared-common shares and nonvested common shares (255) (247) (249) Undistributed earnings 342 1,132 265 Percentage allocated to common shareholders (1) 98.7 % 98.7 % 98.7 % 337 1,117 262 Add: dividends declared-common shareholders 252 244 246 Numerator for basic and diluted earnings per common share $ 589 $ 1,361 $ 508 Denominator Denominator for basic earnings per weighted-average common shares 39 39 40 Effect of dilutive securities: Options - - - Denominator for diluted earnings per adjusted weighted-average common shares 39 39 40 Per common share net income (loss) Basic $ 15.19 $ 34.66 $ 12.81 Diluted $ 15.19 $ 34.62 $ 12.78 (1) Basic weighted-average common shares outstanding 39 39 40 Basic weighted-average common shares outstanding and nonvested common shares expected to vest 39 40 40 Percentage allocated to common shareholders 98.7 % 98.7 % 98.7 % (Some amounts may not reconcile due to rounding.)

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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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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