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Income Taxes - Accumulated Other Comprehensive Income/(Loss) (Net of Tax) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Before Income Taxes And Income Tax Expense Benefit [Line Items] |  |  |
Income (loss) before income taxes | $ (2,596) | $ (18,379) | $ 824
Statutory tax rate in Israel | 23.00% | 24.00% | 25.00%
Theoretical provision for income taxes | $ (597) | $ (4,411) | $ 206
Increase (decrease) in effective tax rate due to: |  |  |
The Parent Company and its Israeli subsidiaries- Mainly tax benefits arising from reduced tax rates under benefit programs | (134) | (253) | (212)
Non-Israeli subsidiaries, including impairments | 381 | 3,817 | 546
U.S. Tax Cuts and Jobs Act effect | 97 | (1,061) |
Increase (decrease) in other uncertain tax positions-net | 58 | (25) | (19)
Effective consolidated income taxes | $ (195) | $ (1,933) | $ 521

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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