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Income Taxes (Schedule of Deductible Loss and Credit Carryforwards) (Parenthetical) (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Operating loss carryforwards | $ 1,246
Maximum [Member] |
Expiration date | Dec. 31, 2038
Minimum [Member] |
Expiration date | Dec. 31, 2036
Discontinued Operations |
Operating loss carryforwards | $ 53
Valution allowance | $ 5

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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- Definition Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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