Debt - Credit Agreement - Additional Information (Detail) - Credit Agreement [Member] - Revolving Credit Facility [Member] - USD ($)	1 Months Ended
Mar. 31, 2019	Jun. 30, 2015
Debt Instrument [Line Items]
Senior asset-based revolving credit agreement, total lender commitments	$ 2,425,000,000
Senior asset-based revolving credit agreement, increase in total lender commitments	$ 500,000,000
Commitments extended term	2023-07
Syndicate of Banks [Member] \| Federal Funds Purchased [Member]
Debt Instrument [Line Items]
Line of credit, additional interest rate		0.50%
Syndicate of Banks [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Line of credit, additional interest rate		1.00%
Syndicate of Banks [Member] \| Undrawn amounts interest rate [Member]
Debt Instrument [Line Items]
Line of credit, additional interest rate		0.25%

Commitments extended term.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ 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

No definition available.

+ Details

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- Definition

Amount of increase (decrease) of the credit facility.

+ 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.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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