Employee Benefit Plans and Postretirement Benefits - Cash Flows Related to Total Benefits Expected to be Paid (Detail) $ in Millions	Dec. 31, 2019 USD ($)
Pension
Defined Benefit Plan Disclosure [Line Items]
2020	$ 136
2021	135
2022	138
2023	142
2024	138
2025 - 2029	713
Total	1,402
Healthcare
Defined Benefit Plan Disclosure [Line Items]
2020	33
2021	32
2022	30
2023	30
2024	29
2025 - 2029	139
Total	293
Medicare Part D Reimbursement
Defined Benefit Plan Disclosure [Line Items]
2020	0
2021	0
2022	0
2023	0
2024	0
2025 - 2029	(1)
Total	(1)
Other
Defined Benefit Plan Disclosure [Line Items]
2020	31
2021	27
2022	30
2023	28
2024	28
2025 - 2029	137
Total	$ 281

Defined benefit plan expected future benefit payments for next ten years.

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- Definition

Defined benefit plan expected to be received for next ten years.

+ References

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- Definition

Defined benefit plan expected to be received next twelve months.

+ References

No definition available.

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- Definition

Defined benefit plan expected to be received year five.

+ References

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- Definition

Defined benefit plan expected to be received year five fiscal years thereafter.

+ References

No definition available.

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- Definition

Defined benefit plan expected to be received year four.

+ References

No definition available.

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- Definition

Defined benefit plan expected to be received year three.

+ References

No definition available.

+ Details

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- Definition

Defined benefit plan expected to be received year two.

+ References

No definition available.

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- Definition

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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- Definition

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
-Name Accounting Standards Codification
-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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- Definition

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

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- Definition

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

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

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Amount of benefits for defined benefit plan expected to be paid in third 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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