Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Percentage of vesting of award under share-based payment arrangement.

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Stockholders' Equity - Narrative (Details) - RSUs - Certain Employees - USD ($) shares in Thousands, $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended	7 Months Ended	9 Months Ended
	Jul. 31, 2018	Sep. 30, 2018	Sep. 30, 2019	Jul. 31, 2018	Sep. 30, 2019
Class of Stock [Line Items]
Shares granted (in shares)		73		3,297	2,525
Compensation expense		$ 2	$ 5		$ 14
Tranche One
Class of Stock [Line Items]
Vesting percentage					33.30%
Tranche Two
Class of Stock [Line Items]
Vesting percentage					33.30%
Tranche Three
Class of Stock [Line Items]
Vesting percentage					33.40%
Nationstar Mortgage Holdings Inc.
Class of Stock [Line Items]
Compensation expense	$ 9			$ 17
One-time accelerated vesting				$ 7