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Special Charges (Credit) - Components of Special Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Other Income and Expenses [Abstract] |  |  |  |
CARES Act grant | $ (1,589) | $ 0 | $ (1,589) | $ 0
Impairment of assets | 80 | 61 | 130 | 69
Severance and benefit costs | 63 | 6 | 63 | 12
(Gains) losses on sale of assets and other special charges | (3) | 4 | 10 | 8
Total operating special charges (credit) | (1,449) | 71 | (1,386) | 89
Nonoperating special termination benefits and settlement losses | 231 | 0 | 231 | 0
Nonoperating unrealized (gains) losses on investments | (9) | (34) | 310 | (51)
Nonoperating credit loss on BRW Term Loan and related guarantee | 0 | 0 | 697 | 0
Total nonoperating special charges (credit) and unrealized (gains) losses on investments | 222 | (34) | 1,238 | (51)
Total operating and nonoperating special charges (credit) and unrealized (gains) losses on investments | (1,227) | 37 | (148) | 38
Income tax expense (benefit), net of valuation allowance | 241 | (8) | 227 | (8)
Total operating and nonoperating special charges (credit) and unrealized (gains) losses on investments, net of income taxes | $ (986) | $ 29 | $ 79 | $ 30

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- Definition Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due To Settlement, Restructuring And Special And Contractual Termination Benefits + References No definition available. + Details
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