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Employee Benefit Plans (Tables) | 3 Months Ended
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Mar. 31, 2019
Employee-related Liabilities [Abstract] |
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
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  |
Service cost |  | $ | 46 |  |  | $ | 57 |  |  | $ | 2 |  |  | $ | 3 |  |  | Salaries and related costs
Interest cost |  | 57 |  |  | 54 |  |  | 15 |  |  | 15 |  |  | Miscellaneous, net
Expected return on plan assets |  | (72 | ) |  | (73 | ) |  | — |  |  | — |  |  | Miscellaneous, net
Amortization of unrecognized (gain) loss |  | 29 |  |  | 33 |  |  | (15 | ) |  | (8 | ) |  | Miscellaneous, net
Amortization of prior service credit |  | — |  |  | — |  |  | (10 | ) |  | (9 | ) |  | Miscellaneous, net
Total |  | $ | 60 |  |  | $ | 71 |  |  | $ | (8 | ) |  | $ | 1 |  |  |
Information Related to Share-Based Compensation | The table below presents information related to share-based compensation (in millions):
| Three Months Ended March 31,
| 2019 |  | 2018
Share-based compensation expense | $ | 16 |  |  | $ | 17 |
| March 31, 2019 |  | December 31, 2018
Unrecognized share-based compensation | $ | 84 |  |  | $ | 68 |

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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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