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Estimated Future Benefit Payments (Detail) $ in Millions | Dec. 31, 2016 USD ($)
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Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2017 | $ 303
2018 | 300
2019 | 310
2020 | 319
2021 | 337
Years 2022 - 2026 | 1,782
Other Postretirement Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2017 | 112
2018 | 117
2019 | 122
2020 | 126
2021 | 130
Years 2022 - 2026 | 682
Other Postretirement-Subsidy Receipts |
Defined Benefit Plan Disclosure [Line Items] |
2017 | 6
2018 | 6
2019 | 7
2020 | 7
2021 | 8
Years 2022 - 2026 | $ 44

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- Definition Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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 (f) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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 (f) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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