Restructuring Activities - Summary of Changes in Liabilities for Restructuring Activities (Parenthetical) (Detail) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)
Operating Lease Right-of-use Assets
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 3

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.

No definition available.

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