Revenues - Unbilled Receivables (Detail) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
MIS
Disaggregation of Revenue [Line Items]
Unbilled Receivables	$ 416	$ 386
MA
Disaggregation of Revenue [Line Items]
Unbilled Receivables	$ 223	$ 152

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.

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