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Segment Financial Information (Schedule of Total Revenues From External Customers And Long-Lived Assets) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Revenues From External Customers And Long Lived Assets [Line Items]      
Revenues from external customers $ 9,221 $ 7,086 $ 6,202
Domestic | Title Insurance and Services      
Revenues From External Customers And Long Lived Assets [Line Items]      
Revenues from external customers 7,872 6,193 5,375
Long-lived assets 945 957 982
Foreign | Title Insurance and Services      
Revenues From External Customers And Long Lived Assets [Line Items]      
Revenues from external customers 448 342 301
Long-lived assets $ 51 $ 60 $ 66