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Schedule III - Income Statement Captions (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Supplementary Insurance Information By Segment [Line Items]      
Premiums and escrow fees $ 7,355 $ 5,747 $ 5,032
Net investment income (1) [1] 651 326 382
Loss provision 589 580 446
Amortization of deferred policy acquisition costs (credits) 11 (2) (1)
Other operating expenses 1,323 1,119 923
Premiums written 450 520 482
Operating Segments | Title Insurance and Services      
Supplementary Insurance Information By Segment [Line Items]      
Premiums and escrow fees 6,857 5,249 4,561
Net investment income (1) [1] 260 285 339
Loss provision 275 263 182
Amortization of deferred policy acquisition costs (credits) 0 0 0
Other operating expenses 1,198 1,000 805
Premiums written 0 0 0
Operating Segments | Specialty Insurance      
Supplementary Insurance Information By Segment [Line Items]      
Premiums and escrow fees 498 498 471
Net investment income (1) [1] 30 21 22
Loss provision 314 317 264
Amortization of deferred policy acquisition costs (credits) 11 (2) (1)
Other operating expenses 89 83 81
Premiums written 450 520 482
Operating Segments | Corporate      
Supplementary Insurance Information By Segment [Line Items]      
Premiums and escrow fees 0 0 0
Net investment income (1) [1] 362 21 22
Loss provision 0 0 0
Amortization of deferred policy acquisition costs (credits) 0 0 0
Other operating expenses 37 37 38
Premiums written 0 0 0
Eliminations      
Supplementary Insurance Information By Segment [Line Items]      
Premiums and escrow fees 0 0 0
Net investment income (1) [1] (1) (1) (1)
Loss provision 0 0 0
Amortization of deferred policy acquisition costs (credits) 0 0 0
Other operating expenses (1) (1) (1)
Premiums written $ 0 $ 0 $ 0
[1]

Includes net investment income and net investment gains (losses).