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Other Comprehensive Earnings (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2021
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] |
Components Of Other Comprehensive Earnings (Loss) | Components of other comprehensive earnings (loss) consist of the following:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Pension and postretirement benefit plans: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning accumulated pension and postretirement benefits |  | $ | (101 | ) |  | $ | (117 | ) |  | $ | (127 | ) |  | $ | (119 | )
Recognition of net actuarial loss and prior service cost in earnings (1) |  |  | 1 |  |  |  | 1 |  |  |  | 2 |  |  |  | 4 |
Settlement of pension benefits (2) |  |  | — |  |  |  | — |  |  |  | 18 |  |  |  | — |
Income tax expense |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (1 | )
Other (3) |  |  | — |  |  |  | — |  |  |  | 7 |  |  |  | — |
Accumulated other comprehensive loss, net of tax |  | $ | (100 | ) |  | $ | (116 | ) |  | $ | (100 | ) |  | $ | (116 | )
| (1) | Recognition of net actuarial loss and prior service cost are included in the computation of net periodic benefit cost, which is a component of other, net in the accompanying consolidated statements of comprehensive earnings.
| (2) | The Merger triggered settlement payments to certain plan participants, and the expense associated with this settlement is recognized as a component of restructuring and transaction costs in the accompanying consolidated statements of comprehensive earnings.
| (3) | Other includes a remeasurement of the pension obligation due to the Merger, which was partially offset by a change in mortality assumption.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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