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Employee Benefit Plans - Pre-tax Net Changes in Projected Benefit Obligations Recognized in Other Comprehensive Income (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total recognized in other comprehensive (loss) income | $ (14) | $ (6) | $ (12)
Pension |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actuarial (gain) loss arising during the year | (2) | (7) |
Amortization of loss included in net periodic benefit cost | (1) | (1) | (1)
Prior service (credit) cost arising during the year | 0 | 0 |
Recognition of gain due to curtailment | 1 | 0 |
Foreign currency exchange | (1) | 2 |
Total recognized in other comprehensive (loss) income | (3) | (6) |
Postemployment |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actuarial (gain) loss arising during the year | 12 | 13 |
Amortization of loss included in net periodic benefit cost | (4) | (2) | $ (1)
Prior service (credit) cost arising during the year | 0 | (1) |
Recognition of gain due to curtailment | 0 | 0 |
Foreign currency exchange | 0 | 0 |
Total recognized in other comprehensive (loss) income | $ 8 | $ 10 |

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- Definition Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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