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Employee Benefit Plans - Benefit Obligations in Excess of Plan Assets (Details) $ in Millions | Dec. 31, 2018 USD ($)
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Projected Benefit Obligation |
Aggregate fair value of plan assets | $ 2,337
Aggregate benefit obligation | (2,677)
Accumulated Benefit Obligation |
Aggregate fair value of plan assets | 2,337
Aggregate benefit obligation | $ (2,542)

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- Definition Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920 + Details
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