Leases - Maturity of Lease Liabilities (Detail) $ in Millions	Dec. 31, 2020 USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
2021	$ 19
2022	14
2023	9
2024	3
Thereafter	1
Total future lease payments	46
Less: interest	(4)
Present value of lease liabilities	42
Finance Lease Liabilities, Payments, Due [Abstract]
2021	6
2022	4
2023	1
2025	0
Thereafter	2
Total future lease payments	13
Less: interest	(2)
Present value of lease liabilities	$ 11

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977