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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	25. Subsequent Events On February 1, 2019, Nationstar Mortgage LLC, a wholly-owned subsidiary of the Company, completed an acquisition of all of the limited liability units of Pacific Union Financial, LLC, a California limited liability company. The aggregate purchase price for the limited liability units was approximately $128, which is subject to adjustment. On January 3, 2019, the Company entered into a definitive agreement to acquire servicing rights underlying $24 billion in GSE mortgages, enter into a subservicing contract for an additional $24 billion in mortgages, and purchase the Seterus mortgage servicing platform and assume certain related assets from IBM. The acquisition of the Seterus mortgage servicing platform and certain related assets from IBM was completed on February 28, 2019 for a total purchase price of approximately $8.