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Employee Benefit Plans (Tables) | 3 Months Ended
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Mar. 31, 2018
Components of Net Periodic Benefit Cost | The Company’s net periodic benefit cost includes the following components for the three months ended March 31 (in millions):
|  | Pension Benefits |  |  | Other Postretirement Benefits |  |  | Affected Line Item in the Statements of Consolidated Operations |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |  |  |  |
Service cost |  | $ | 57 |  |  | $ | 49 |  |  | $ | 3 |  |  | $ | 2 |  |  |  | Salaries and related costs |
Interest cost |  |  | 54 |  |  |  | 55 |  |  |  | 15 |  |  |  | 17 |  |  |  | Miscellaneous, net |
Expected return on plan assets |  |  | (73) |  |  |  | (60) |  |  |  | — |  |  |  | — |  |  |  | Miscellaneous, net |
Amortization of unrecognized (gain) loss and prior service cost (credit) |  |  | 33 |  |  |  | 31 |  |  |  | (17) |  |  |  | (18) |  |  |  | Miscellaneous, net |
Settlement loss |  |  | — |  |  |  | 1 |  |  |  | — |  |  |  | — |  |  |  | Miscellaneous, net |
Total |  | $ | 71 |  |  | $ | 76 |  |  | $ | 1 |  |  | $ | 1 |  |  |  |  |
Share-Based Compensation Expense | The table below presents information related to share-based compensation (in millions):
|  | Three Months Ended March 31, |
|  | 2018 |  |  | 2017 |
Share-based compensation expense |  | $ | 17 |  |  | $ | 23 |
|  | March 31, 2018 |  |  | December 31, 2017 |
Unrecognized share-based compensation |  | $ | 102 |  |  | $ | 53 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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