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Benefit Plans (Estimated Net Loss and Prior Service Cost (Credit) Expected to be Amortized in 2016) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($)
Postretirement Benefit Plan [Member] |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Estimated future net loss | $ 30
Estimate future prior service cost (credit) | (40)
Pension [Member] |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Estimated future net loss | 183
Estimate future prior service cost (credit) | $ 5

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- Definition Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
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- Definition Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
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