Long-Term Employee Benefit Liabilities - Future Benefit Payments (Detail) $ in Millions	Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Expected employer contributions - 2019	$ 24
2019	34
2020	37
2021	37
2022	40
2023	45
Thereafter	265
Total	458
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected employer contributions - 2019	13
2019	23
2020	25
2021	24
2022	25
2023	26
Thereafter	145
Total	268
Termination and Long Service Arrangements [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected employer contributions - 2019	9
2019	9
2020	10
2021	11
2022	13
2023	17
Thereafter	111
Total	171
Retirement Medical Benefits Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected employer contributions - 2019	2
2019	2
2020	2
2021	2
2022	2
2023	2
Thereafter	9
Total	$ 19

Defined benefit plan expected aggregate future benefit payments.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

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Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
-Paragraph 1
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