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Pension and Other Postretirement Benefits - Schedule of Benefit Payments Expected to be Paid and Expected Medicare Part D Subsidy Receipts (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013
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Pension Benefits [Member] |
Defined Benefit Plan Disclosure [Line Items] |
2014 | $ 880
2015 | 880
2016 | 900
2017 | 910
2018 | 920
2019 through 2023 | 4,680
Total benefit payments | 9,170
Gross Other Post-Retirement Benefits [Member] |
Defined Benefit Plan Disclosure [Line Items] |
2014 | 260
2015 | 260
2016 | 260
2017 | 255
2018 | 255
2019 through 2023 | 1,195
Total benefit payments | 2,485
Medicare Part D Subsidy Receipts [Member] |
Defined Benefit Plan Disclosure [Line Items] |
2014 | 25
2015 | 25
2016 | 25
2017 | 30
2018 | 30
2019 through 2023 | 145
Total benefit payments | 280
Net Other Post-Retirement Benefits [Member] |
Defined Benefit Plan Disclosure [Line Items] |
2014 | 235
2015 | 235
2016 | 235
2017 | 225
2018 | 225
2019 through 2023 | 1,050
Total benefit payments | $ 2,205

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- Definition Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan. + 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=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan. + 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=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan. + 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=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan. + 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=28361610&loc=d3e1928-114920 + Details
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