Income Taxes - Reconciliation (Details)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CoreLogic
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%
State taxes, net of federal benefit	3.10%	8.70%	3.50%
Foreign taxes in excess of federal rate	2.20%	26.20%	5.90%
Nontaxable/nondeductible items	(0.60%)	0.50%	(3.90%)
Change in uncertain tax positions	(2.10%)	1.60%	(3.10%)
Research and development credits	(1.90%)	(17.10%)	(6.60%)
Net impact of FAFC indemnity	0.00%	(37.40%)	0.50%
Return to provision adjustments	(0.40%)	(4.10%)	(0.40%)
Federal tax rate reduction	0.00%	(5.90%)	(1.40%)
Transition tax	0.00%	0.00%	12.30%
IRS exam settlement	(6.20%)	0.00%	0.00%
Capital losses utilized	(2.70%)	0.00%	0.00%
Other items, net	1.30%	0.80%	1.20%
Effective income tax rate	13.70%	(5.70%)	29.00%
Corporate Joint Venture
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%
State taxes, net of federal benefit	4.00%	4.00%	4.00%
Foreign taxes in excess of federal rate	0.00%	0.00%	0.00%
Nontaxable/nondeductible items	0.00%	0.00%	0.00%
Change in uncertain tax positions	0.00%	0.00%	0.00%
Research and development credits	0.00%	0.00%	0.00%
Net impact of FAFC indemnity	0.00%	0.00%	0.00%
Return to provision adjustments	0.00%	0.00%	0.00%
Federal tax rate reduction	0.00%	0.00%	0.00%
Transition tax	0.00%	0.00%	0.00%
IRS exam settlement	0.00%	0.00%	0.00%
Capital losses utilized	0.00%	0.00%	0.00%
Other items, net	0.00%	0.00%	0.00%
Effective income tax rate	25.00%	25.00%	25.00%

Effective Income Tax Rate Reconciliation, Capital Losses, Percent

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Effective Income Tax Rate Reconciliation Return to Provision

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Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act Of 2017, Transition Tax, Percent

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Effective Income Tax Rate Reconciliation, indemnification position change, Percent

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Effective Income Tax Reconciliation, Change in Uncertain Tax Positions

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Name Accounting Standards Codification
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

+ References

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

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