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Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Data (Unaudited) | Pursuant to Article 3 of the SEC’s Regulation S-X, the following are selected quarterly financial data:
Fiscal Year Ended December 2019 | Quarters
(Dollars in Millions, Except Per Share Amounts) | 1st |  | 2nd |  | 3rd |  | 4th |  | Full Year
Revenue | $ | 3,013 |  |  | $ | 3,061 |  |  | $ | 2,978 |  |  | $ | 2,885 |  |  | $ | 11,937 |
Operating Income | 1,219 |  |  | 1,305 |  |  | 1,287 |  |  | 1,154 |  |  | 4,965 |
Net Earnings | 834 |  |  | 870 |  |  | 856 |  |  | 771 |  |  | 3,331 |
Earnings Per Share, Basic | $ | 1.02 |  |  | $ | 1.08 |  |  | $ | 1.08 |  |  | $ | 0.99 |  |  | $ | 4.18 |
Earnings Per Share, Assuming Dilution | 1.02 |  |  | 1.08 |  |  | 1.08 |  |  | 0.99 |  |  | 4.17 |
Fiscal Year Ended December 2018 |  |  |  |  |  |  |  |  |
Revenue | $ | 2,876 |  |  | $ | 3,102 |  |  | $ | 3,129 |  |  | $ | 3,143 |  |  | $ | 12,250 |
Operating Income | 1,044 |  |  | 1,283 |  |  | 1,293 |  |  | 1,249 |  |  | 4,869 |
Net Earnings | 695 |  |  | 877 |  |  | 894 |  |  | 843 |  |  | 3,309 |
Earnings Per Share, Basic | $ | 0.78 |  |  | $ | 1.02 |  |  | $ | 1.05 |  |  | $ | 1.02 |  |  | $ | 3.86 |
Earnings Per Share, Assuming Dilution | 0.78 |  |  | 1.01 |  |  | 1.05 |  |  | 1.01 |  |  | 3.84 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118952077&loc=d3e1280-108306 + Details
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