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Schedule of Weighted Average Assumptions to Determine Pension Obligations (Detail) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Postretirement Benefit Plans |  |  |
Defined Benefit Plan Disclosure |  |  |
Discount rate | 2.60% | 2.20% | 3.00%
Initial medical trend | 7.30% | 7.30% | 7.10%
Ultimate health care trend | 4.50% | 4.50% | 4.50%
Medical cost trend rate decrease to ultimate rate in year | 2029 | 2029 | 2026
UNITED STATES |  |  |
Defined Benefit Plan Disclosure |  |  |
Discount rate | 2.60% | 2.20% |
Salary progression rate | 2.40% | 2.40% |
Foreign Pension Plans, Defined Benefit |  |  |
Defined Benefit Plan Disclosure |  |  |
Discount rate | 1.10% | 0.70% |
Salary progression rate | 2.20% | 2.30% |

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- Definition Defined benefit plan assumptions used calculating benefit obligation salary progression rate. + References No definition available. + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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