Guarantor Financial Statement Information - Consolidating Statements of Cash Flow (Details) - USD ($) $ 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, 2017	Jul. 31, 2018	Sep. 30, 2017
Operating Activities
Net income (loss) attributable to Nationstar		$ 1,020
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests		0
Deferred tax benefit		(931)
(Gain) loss from subsidiaries		0
Net gain on mortgage loans held for sale		(83)
Reverse mortgage loan interest income		(72)
Gain on sale of assets		0
MSL related increased obligation		0
Provision for servicing reserves		14
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities		(27)
Fair value changes in excess spread financing		26
Fair value changes in mortgage servicing rights financing liability		0
Amortization of premiums, net of discount accretion		3
Depreciation and amortization for property and equipment and intangible assets		15
Share-based compensation		2
Other (gain) loss		0
Repurchases of forward loan assets out of Ginnie Mae securitizations		(223)
Mortgage loans originated and purchased for sale, net of fees		(3,458)
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment		3,546
Changes in assets and liabilities:
Advances and other receivables		76
Reverse mortgage interests		442
Other assets		(15)
Payables and accrued liabilities		(159)
Net cash attributable to operating activities		176
Investing Activities
Acquisition, net of cash acquired		(33)
Property and equipment additions, net of disposals		(14)
Purchase of forward mortgage servicing rights, net of liabilities incurred		(63)
Net payment related to acquisition of HECM related receivables		0
Net proceeds from acquisition of reverse mortgage servicing portfolio and HECM related receivables		0
Proceeds on sale of forward and reverse mortgage servicing rights		60
Proceeds on sale of assets		0
Net cash attributable to investing activities		(50)
Financing Activities
Increase (decrease) in warehouse facilities		186
Decrease in advance facilities		46
Proceeds from issuance of HECM securitizations		0
Repayment of HECM securitizations		(91)
Proceeds from issuance of participating interest financing in reverse mortgage interests, net		45
Repayment of participating interest financing in reverse mortgage interests		(403)
Proceeds from the issuance of excess spread financing		84
Repayment of excess spread financing		(21)
Settlement of excess spread financing		(31)
Repayment of nonrecourse debt – legacy assets		(3)
Repurchase of unsecured senior notes		0
Redemption and repayment of unsecured senior notes		(1,030)
Surrender of shares relating to stock vesting		0
Debt financing costs		(1)
Dividends to non-controlling interests		0
Net cash attributable to financing activities		(1,219)
Net (decrease) increase in cash, cash equivalents, and restricted cash		(1,093)
Cash, cash equivalents, and restricted cash - beginning of period		1,623
Cash, cash equivalents, and restricted cash - end of period	$ 1,623	530		$ 1,623
Predecessor
Operating Activities
Net income (loss) attributable to Nationstar	(64)		$ 7	154	$ (11)
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests	0		0	0	1
Deferred tax benefit				0	0
(Gain) loss from subsidiaries				0	0
Net gain on mortgage loans held for sale	(44)		(154)	(295)	(465)
Reverse mortgage loan interest income				(274)	(370)
Gain on sale of assets				(9)	(8)
MSL related increased obligation				59	0
Provision for servicing reserves				70	97
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities				(177)	362
Fair value changes in excess spread financing				81	0
Fair value changes in mortgage servicing rights financing liability				16	(7)
Amortization of premiums, net of discount accretion				8	63
Depreciation and amortization for property and equipment and intangible assets	4		15	33	44
Share-based compensation				17	13
Other (gain) loss				3	5
Repurchases of forward loan assets out of Ginnie Mae securitizations				(544)	(943)
Mortgage loans originated and purchased for sale, net of fees				(12,328)	(14,002)
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment				13,392	15,472
Excess tax benefit from share-based compensation					(1)
Changes in assets and liabilities:
Advances and other receivables				377	71
Reverse mortgage interests				1,601	1,226
Other assets				(41)	(17)
Payables and accrued liabilities				151	(284)
Net cash attributable to operating activities				2,294	1,246
Investing Activities
Acquisition, net of cash acquired				0	0
Property and equipment additions, net of disposals				(40)	(34)
Purchase of forward mortgage servicing rights, net of liabilities incurred				(134)	(28)
Net payment related to acquisition of HECM related receivables				(1)	0
Net proceeds from acquisition of reverse mortgage servicing portfolio and HECM related receivables				0	16
Proceeds on sale of forward and reverse mortgage servicing rights				0	25
Proceeds on sale of assets				13	16
Net cash attributable to investing activities				(162)	(5)
Financing Activities
Increase (decrease) in warehouse facilities				(585)	351
Decrease in advance facilities				(305)	(298)
Proceeds from issuance of HECM securitizations				759	706
Repayment of HECM securitizations				(448)	(484)
Proceeds from issuance of participating interest financing in reverse mortgage interests, net				208	437
Repayment of participating interest financing in reverse mortgage interests				(1,599)	(1,928)
Proceeds from the issuance of excess spread financing				70	0
Repayment of excess spread financing				(3)	(9)
Settlement of excess spread financing				(105)	(159)
Repayment of nonrecourse debt – legacy assets				(7)	(12)
Repurchase of unsecured senior notes				(62)	(122)
Redemption and repayment of unsecured senior notes				0	0
Surrender of shares relating to stock vesting				(9)	(4)
Debt financing costs				(24)	(11)
Dividends to non-controlling interests				(1)	(5)
Net cash attributable to financing activities				(2,111)	(1,538)
Net (decrease) increase in cash, cash equivalents, and restricted cash				21	(297)
Cash, cash equivalents, and restricted cash - beginning of period		596		575	877
Cash, cash equivalents, and restricted cash - end of period	596		580	596	580
Eliminations
Operating Activities
Net income (loss) attributable to Nationstar		(57)
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests		0
Deferred tax benefit		0
(Gain) loss from subsidiaries		57
Net gain on mortgage loans held for sale		0
Reverse mortgage loan interest income		0
Provision for servicing reserves		0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities		0
Fair value changes in excess spread financing		0
Amortization of premiums, net of discount accretion		0
Depreciation and amortization for property and equipment and intangible assets		0
Share-based compensation		0
Repurchases of forward loan assets out of Ginnie Mae securitizations		0
Mortgage loans originated and purchased for sale, net of fees		0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment		0
Changes in assets and liabilities:
Advances and other receivables		0
Reverse mortgage interests		0
Other assets		0
Payables and accrued liabilities		0
Net cash attributable to operating activities		0
Investing Activities
Acquisition, net of cash acquired		0
Property and equipment additions, net of disposals		0
Purchase of forward mortgage servicing rights, net of liabilities incurred		0
Proceeds on sale of forward and reverse mortgage servicing rights		0
Net cash attributable to investing activities		0
Financing Activities
Increase (decrease) in warehouse facilities		0
Decrease in advance facilities		0
Repayment of HECM securitizations		0
Proceeds from issuance of participating interest financing in reverse mortgage interests, net		0
Repayment of participating interest financing in reverse mortgage interests		0
Proceeds from the issuance of excess spread financing		0
Repayment of excess spread financing		0
Settlement of excess spread financing		0
Repayment of nonrecourse debt – legacy assets		0
Redemption and repayment of unsecured senior notes		0
Debt financing costs		0
Net cash attributable to financing activities		0
Net (decrease) increase in cash, cash equivalents, and restricted cash		0
Cash, cash equivalents, and restricted cash - beginning of period		0
Cash, cash equivalents, and restricted cash - end of period	0	0		0
Eliminations | Predecessor
Operating Activities
Net income (loss) attributable to Nationstar	30		(18)	(237)	(29)
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests	0		0	0	0
(Gain) loss from subsidiaries				237	29
Net gain on mortgage loans held for sale	0		0	0	0
Reverse mortgage loan interest income				0	0
Gain on sale of assets				0	0
MSL related increased obligation				0
Provision for servicing reserves				0	0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities				0	0
Fair value changes in excess spread financing				0	0
Fair value changes in mortgage servicing rights financing liability				0	0
Amortization of premiums, net of discount accretion				0	0
Depreciation and amortization for property and equipment and intangible assets				0	0
Share-based compensation				0	0
Other (gain) loss				0	0
Repurchases of forward loan assets out of Ginnie Mae securitizations				0	0
Mortgage loans originated and purchased for sale, net of fees				0	0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment				0	0
Excess tax benefit from share-based compensation					0
Changes in assets and liabilities:
Advances and other receivables				0	0
Reverse mortgage interests				0	0
Other assets				0	0
Payables and accrued liabilities				0	0
Net cash attributable to operating activities				0	0
Investing Activities
Property and equipment additions, net of disposals				0	0
Purchase of forward mortgage servicing rights, net of liabilities incurred				0	0
Net payment related to acquisition of HECM related receivables				0
Net proceeds from acquisition of reverse mortgage servicing portfolio and HECM related receivables					0
Proceeds on sale of forward and reverse mortgage servicing rights					0
Proceeds on sale of assets				0	0
Net cash attributable to investing activities				0	0
Financing Activities
Increase (decrease) in warehouse facilities				0	0
Decrease in advance facilities				0	0
Proceeds from issuance of HECM securitizations				0	0
Repayment of HECM securitizations				0	0
Proceeds from issuance of participating interest financing in reverse mortgage interests, net				0	0
Repayment of participating interest financing in reverse mortgage interests				0	0
Proceeds from the issuance of excess spread financing				0
Repayment of excess spread financing				0	0
Settlement of excess spread financing				0	0
Repayment of nonrecourse debt – legacy assets				0	0
Repurchase of unsecured senior notes				0	0
Surrender of shares relating to stock vesting				0	0
Debt financing costs				0	0
Dividends to non-controlling interests				0	0
Net cash attributable to financing activities				0	0
Net (decrease) increase in cash, cash equivalents, and restricted cash				0	0
Cash, cash equivalents, and restricted cash - beginning of period		0		0	0
Cash, cash equivalents, and restricted cash - end of period	0		0	0	0
Mr. Cooper | Predecessor
Investing Activities
Net proceeds from acquisition of reverse mortgage servicing portfolio and HECM related receivables					0
Mr. Cooper | Reportable entities
Operating Activities
Net income (loss) attributable to Nationstar		1,020
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests		0
Deferred tax benefit		(990)
(Gain) loss from subsidiaries		(56)
Net gain on mortgage loans held for sale		0
Reverse mortgage loan interest income		0
Provision for servicing reserves		0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities		0
Fair value changes in excess spread financing		0
Amortization of premiums, net of discount accretion		1
Depreciation and amortization for property and equipment and intangible assets		0
Share-based compensation		0
Repurchases of forward loan assets out of Ginnie Mae securitizations		0
Mortgage loans originated and purchased for sale, net of fees		0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment		0
Changes in assets and liabilities:
Advances and other receivables		0
Reverse mortgage interests		0
Other assets		0
Payables and accrued liabilities		19
Net cash attributable to operating activities		(6)
Investing Activities
Acquisition, net of cash acquired		0
Property and equipment additions, net of disposals		0
Purchase of forward mortgage servicing rights, net of liabilities incurred		0
Proceeds on sale of forward and reverse mortgage servicing rights		0
Net cash attributable to investing activities		0
Financing Activities
Increase (decrease) in warehouse facilities		0
Decrease in advance facilities		0
Repayment of HECM securitizations		0
Proceeds from issuance of participating interest financing in reverse mortgage interests, net		0
Repayment of participating interest financing in reverse mortgage interests		0
Proceeds from the issuance of excess spread financing		0
Repayment of excess spread financing		0
Settlement of excess spread financing		0
Repayment of nonrecourse debt – legacy assets		0
Redemption and repayment of unsecured senior notes		0
Debt financing costs		0
Net cash attributable to financing activities		0
Net (decrease) increase in cash, cash equivalents, and restricted cash		(6)
Cash, cash equivalents, and restricted cash - beginning of period		11
Cash, cash equivalents, and restricted cash - end of period	11	5		11
Mr. Cooper | Reportable entities | Predecessor
Operating Activities
Net income (loss) attributable to Nationstar	(64)		7	154	(11)
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests	0		0	0	0
(Gain) loss from subsidiaries				(181)	11
Net gain on mortgage loans held for sale	0		0	0	0
Reverse mortgage loan interest income				0	0
Gain on sale of assets				0	0
MSL related increased obligation				0
Provision for servicing reserves				0	0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities				0	0
Fair value changes in excess spread financing				0	0
Fair value changes in mortgage servicing rights financing liability				0	0
Amortization of premiums, net of discount accretion				0	0
Depreciation and amortization for property and equipment and intangible assets				0	0
Share-based compensation				0	0
Other (gain) loss				0	0
Repurchases of forward loan assets out of Ginnie Mae securitizations				0	0
Mortgage loans originated and purchased for sale, net of fees				0	0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment				0	0
Excess tax benefit from share-based compensation					0
Changes in assets and liabilities:
Advances and other receivables				0	0
Reverse mortgage interests				0	0
Other assets				9	4
Payables and accrued liabilities				27	0
Net cash attributable to operating activities				9	4
Investing Activities
Property and equipment additions, net of disposals				0	0
Purchase of forward mortgage servicing rights, net of liabilities incurred				0	0
Net payment related to acquisition of HECM related receivables				0
Proceeds on sale of forward and reverse mortgage servicing rights					0
Proceeds on sale of assets				0	0
Net cash attributable to investing activities				0	0
Financing Activities
Increase (decrease) in warehouse facilities				0	0
Decrease in advance facilities				0	0
Proceeds from issuance of HECM securitizations				0	0
Repayment of HECM securitizations				0	0
Proceeds from issuance of participating interest financing in reverse mortgage interests, net				0	0
Repayment of participating interest financing in reverse mortgage interests				0	0
Proceeds from the issuance of excess spread financing				0
Repayment of excess spread financing				0	0
Settlement of excess spread financing				0	0
Repayment of nonrecourse debt – legacy assets				0	0
Repurchase of unsecured senior notes				0	0
Surrender of shares relating to stock vesting				(9)	(4)
Debt financing costs				0	0
Dividends to non-controlling interests				0	0
Net cash attributable to financing activities				(9)	(4)
Net (decrease) increase in cash, cash equivalents, and restricted cash				0	0
Cash, cash equivalents, and restricted cash - beginning of period		0		0	0
Cash, cash equivalents, and restricted cash - end of period	0		0	0	0
Issuer | Predecessor
Investing Activities
Net proceeds from acquisition of reverse mortgage servicing portfolio and HECM related receivables					16
Issuer | Reportable entities
Operating Activities
Net income (loss) attributable to Nationstar		56
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests		0
Deferred tax benefit		52
(Gain) loss from subsidiaries		(1)
Net gain on mortgage loans held for sale		(83)
Reverse mortgage loan interest income		(72)
Provision for servicing reserves		14
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities		(27)
Fair value changes in excess spread financing		26
Amortization of premiums, net of discount accretion		2
Depreciation and amortization for property and equipment and intangible assets		13
Share-based compensation		2
Repurchases of forward loan assets out of Ginnie Mae securitizations		(223)
Mortgage loans originated and purchased for sale, net of fees		(3,458)
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment		3,537
Changes in assets and liabilities:
Advances and other receivables		76
Reverse mortgage interests		425
Other assets		25
Payables and accrued liabilities		(179)
Net cash attributable to operating activities		185
Investing Activities
Acquisition, net of cash acquired		0
Property and equipment additions, net of disposals		(20)
Purchase of forward mortgage servicing rights, net of liabilities incurred		(63)
Proceeds on sale of forward and reverse mortgage servicing rights		60
Net cash attributable to investing activities		(23)
Financing Activities
Increase (decrease) in warehouse facilities		186
Decrease in advance facilities		(17)
Repayment of HECM securitizations		0
Proceeds from issuance of participating interest financing in reverse mortgage interests, net		45
Repayment of participating interest financing in reverse mortgage interests		(403)
Proceeds from the issuance of excess spread financing		84
Repayment of excess spread financing		(21)
Settlement of excess spread financing		(31)
Repayment of nonrecourse debt – legacy assets		0
Redemption and repayment of unsecured senior notes		(1,030)
Debt financing costs		(1)
Net cash attributable to financing activities		(1,188)
Net (decrease) increase in cash, cash equivalents, and restricted cash		(1,026)
Cash, cash equivalents, and restricted cash - beginning of period		1,358
Cash, cash equivalents, and restricted cash - end of period	1,358	332		1,358
Issuer | Reportable entities | Predecessor
Operating Activities
Net income (loss) attributable to Nationstar	(37)		7	181	(11)
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests	0		0	0	1
(Gain) loss from subsidiaries				(56)	(40)
Net gain on mortgage loans held for sale	(44)		(153)	(295)	(464)
Reverse mortgage loan interest income				(274)	(370)
Gain on sale of assets				0	1
MSL related increased obligation				59
Provision for servicing reserves				70	97
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities				(178)	362
Fair value changes in excess spread financing				81	2
Fair value changes in mortgage servicing rights financing liability				16	(7)
Amortization of premiums, net of discount accretion				11	55
Depreciation and amortization for property and equipment and intangible assets				26	33
Share-based compensation				16	9
Other (gain) loss				3	5
Repurchases of forward loan assets out of Ginnie Mae securitizations				(544)	(943)
Mortgage loans originated and purchased for sale, net of fees				(12,328)	(14,002)
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment				13,381	15,459
Excess tax benefit from share-based compensation					(1)
Changes in assets and liabilities:
Advances and other receivables				377	71
Reverse mortgage interests				1,866	1,451
Other assets				(293)	(99)
Payables and accrued liabilities				128	(273)
Net cash attributable to operating activities				2,247	1,336
Investing Activities
Property and equipment additions, net of disposals				(35)	(31)
Purchase of forward mortgage servicing rights, net of liabilities incurred				(127)	(22)
Net payment related to acquisition of HECM related receivables				(1)
Proceeds on sale of forward and reverse mortgage servicing rights					25
Proceeds on sale of assets				0	16
Net cash attributable to investing activities				(163)	4
Financing Activities
Increase (decrease) in warehouse facilities				(585)	351
Decrease in advance facilities				(55)	(93)
Proceeds from issuance of HECM securitizations				0	(1)
Repayment of HECM securitizations				0	0
Proceeds from issuance of participating interest financing in reverse mortgage interests, net				208	437
Repayment of participating interest financing in reverse mortgage interests				(1,599)	(1,928)
Proceeds from the issuance of excess spread financing				70
Repayment of excess spread financing				(3)	(9)
Settlement of excess spread financing				(105)	(159)
Repayment of nonrecourse debt – legacy assets				0	0
Repurchase of unsecured senior notes				(62)	(122)
Surrender of shares relating to stock vesting				0	0
Debt financing costs				(24)	(11)
Dividends to non-controlling interests				(1)	(5)
Net cash attributable to financing activities				(2,156)	(1,540)
Net (decrease) increase in cash, cash equivalents, and restricted cash				(72)	(200)
Cash, cash equivalents, and restricted cash - beginning of period		351		423	612
Cash, cash equivalents, and restricted cash - end of period	351		412	351	412
Guarantor (Subsidiaries of Issuer) | Predecessor
Investing Activities
Net proceeds from acquisition of reverse mortgage servicing portfolio and HECM related receivables					0
Guarantor (Subsidiaries of Issuer) | Reportable entities
Operating Activities
Net income (loss) attributable to Nationstar		2
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests		0
Deferred tax benefit		0
(Gain) loss from subsidiaries		0
Net gain on mortgage loans held for sale		0
Reverse mortgage loan interest income		0
Provision for servicing reserves		0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities		0
Fair value changes in excess spread financing		0
Amortization of premiums, net of discount accretion		0
Depreciation and amortization for property and equipment and intangible assets		0
Share-based compensation		0
Repurchases of forward loan assets out of Ginnie Mae securitizations		0
Mortgage loans originated and purchased for sale, net of fees		0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment		0
Changes in assets and liabilities:
Advances and other receivables		0
Reverse mortgage interests		0
Other assets		(3)
Payables and accrued liabilities		1
Net cash attributable to operating activities		0
Investing Activities
Acquisition, net of cash acquired		0
Property and equipment additions, net of disposals		0
Purchase of forward mortgage servicing rights, net of liabilities incurred		0
Proceeds on sale of forward and reverse mortgage servicing rights		0
Net cash attributable to investing activities		0
Financing Activities
Increase (decrease) in warehouse facilities		0
Decrease in advance facilities		0
Repayment of HECM securitizations		0
Proceeds from issuance of participating interest financing in reverse mortgage interests, net		0
Repayment of participating interest financing in reverse mortgage interests		0
Proceeds from the issuance of excess spread financing		0
Repayment of excess spread financing		0
Settlement of excess spread financing		0
Repayment of nonrecourse debt – legacy assets		0
Redemption and repayment of unsecured senior notes		0
Debt financing costs		0
Net cash attributable to financing activities		0
Net (decrease) increase in cash, cash equivalents, and restricted cash		0
Cash, cash equivalents, and restricted cash - beginning of period		1
Cash, cash equivalents, and restricted cash - end of period	1	1		1
Guarantor (Subsidiaries of Issuer) | Reportable entities | Predecessor
Operating Activities
Net income (loss) attributable to Nationstar	3		2	12	8
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests	0		0	0	0
(Gain) loss from subsidiaries				0	0
Net gain on mortgage loans held for sale	0		0	0	0
Reverse mortgage loan interest income				0	0
Gain on sale of assets				0	0
MSL related increased obligation				0
Provision for servicing reserves				0	0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities				0	0
Fair value changes in excess spread financing				0	0
Fair value changes in mortgage servicing rights financing liability				0	0
Amortization of premiums, net of discount accretion				0	0
Depreciation and amortization for property and equipment and intangible assets				0	0
Share-based compensation				0	0
Other (gain) loss				0	0
Repurchases of forward loan assets out of Ginnie Mae securitizations				0	0
Mortgage loans originated and purchased for sale, net of fees				0	0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment				0	0
Excess tax benefit from share-based compensation					0
Changes in assets and liabilities:
Advances and other receivables				0	0
Reverse mortgage interests				0	0
Other assets				(12)	(9)
Payables and accrued liabilities				0	0
Net cash attributable to operating activities				0	(1)
Investing Activities
Property and equipment additions, net of disposals				0	0
Purchase of forward mortgage servicing rights, net of liabilities incurred				0	0
Net payment related to acquisition of HECM related receivables				0
Proceeds on sale of forward and reverse mortgage servicing rights					0
Proceeds on sale of assets				0	0
Net cash attributable to investing activities				0	0
Financing Activities
Increase (decrease) in warehouse facilities				0	0
Decrease in advance facilities				0	0
Proceeds from issuance of HECM securitizations				0	0
Repayment of HECM securitizations				0	0
Proceeds from issuance of participating interest financing in reverse mortgage interests, net				0	0
Repayment of participating interest financing in reverse mortgage interests				0	0
Proceeds from the issuance of excess spread financing				0
Repayment of excess spread financing				0	0
Settlement of excess spread financing				0	0
Repayment of nonrecourse debt – legacy assets				0	0
Repurchase of unsecured senior notes				0	0
Surrender of shares relating to stock vesting				0	0
Debt financing costs				0	0
Dividends to non-controlling interests				0	0
Net cash attributable to financing activities				0	0
Net (decrease) increase in cash, cash equivalents, and restricted cash				0	(1)
Cash, cash equivalents, and restricted cash - beginning of period		1		1	2
Cash, cash equivalents, and restricted cash - end of period	1		1	1	1
Non-Guarantor (Subsidiaries of Issuer) | Predecessor
Investing Activities
Net proceeds from acquisition of reverse mortgage servicing portfolio and HECM related receivables					0
Non-Guarantor (Subsidiaries of Issuer) | Reportable entities
Operating Activities
Net income (loss) attributable to Nationstar		(1)
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests		0
Deferred tax benefit		7
(Gain) loss from subsidiaries		0
Net gain on mortgage loans held for sale		0
Reverse mortgage loan interest income		0
Provision for servicing reserves		0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities		0
Fair value changes in excess spread financing		0
Amortization of premiums, net of discount accretion		0
Depreciation and amortization for property and equipment and intangible assets		2
Share-based compensation		0
Repurchases of forward loan assets out of Ginnie Mae securitizations		0
Mortgage loans originated and purchased for sale, net of fees		0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment		9
Changes in assets and liabilities:
Advances and other receivables		0
Reverse mortgage interests		17
Other assets		(37)
Payables and accrued liabilities		0
Net cash attributable to operating activities		(3)
Investing Activities
Acquisition, net of cash acquired		(33)
Property and equipment additions, net of disposals		6
Purchase of forward mortgage servicing rights, net of liabilities incurred		0
Proceeds on sale of forward and reverse mortgage servicing rights		0
Net cash attributable to investing activities		(27)
Financing Activities
Increase (decrease) in warehouse facilities		0
Decrease in advance facilities		63
Repayment of HECM securitizations		(91)
Proceeds from issuance of participating interest financing in reverse mortgage interests, net		0
Repayment of participating interest financing in reverse mortgage interests		0
Proceeds from the issuance of excess spread financing		0
Repayment of excess spread financing		0
Settlement of excess spread financing		0
Repayment of nonrecourse debt – legacy assets		(3)
Redemption and repayment of unsecured senior notes		0
Debt financing costs		0
Net cash attributable to financing activities		(31)
Net (decrease) increase in cash, cash equivalents, and restricted cash		(61)
Cash, cash equivalents, and restricted cash - beginning of period		253
Cash, cash equivalents, and restricted cash - end of period	253	192		253
Non-Guarantor (Subsidiaries of Issuer) | Reportable entities | Predecessor
Operating Activities
Net income (loss) attributable to Nationstar	4		9	44	32
Adjustments to reconcile net income (loss) to net cash attributable to operating activities:
Net income (loss) attributable to non-controlling interests	0		0	0	0
(Gain) loss from subsidiaries				0	0
Net gain on mortgage loans held for sale	0		(1)	0	(1)
Reverse mortgage loan interest income				0	0
Gain on sale of assets				(9)	(9)
MSL related increased obligation				0
Provision for servicing reserves				0	0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities				1	0
Fair value changes in excess spread financing				0	(2)
Fair value changes in mortgage servicing rights financing liability				0	0
Amortization of premiums, net of discount accretion				(3)	8
Depreciation and amortization for property and equipment and intangible assets				7	11
Share-based compensation				1	4
Other (gain) loss				0	0
Repurchases of forward loan assets out of Ginnie Mae securitizations				0	0
Mortgage loans originated and purchased for sale, net of fees				0	0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment				11	13
Excess tax benefit from share-based compensation					0
Changes in assets and liabilities:
Advances and other receivables				0	0
Reverse mortgage interests				(265)	(225)
Other assets				255	87
Payables and accrued liabilities				(4)	(11)
Net cash attributable to operating activities				38	(93)
Investing Activities
Property and equipment additions, net of disposals				(5)	(3)
Purchase of forward mortgage servicing rights, net of liabilities incurred				(7)	(6)
Net payment related to acquisition of HECM related receivables				0
Proceeds on sale of forward and reverse mortgage servicing rights					0
Proceeds on sale of assets				13	0
Net cash attributable to investing activities				1	(9)
Financing Activities
Increase (decrease) in warehouse facilities				0	0
Decrease in advance facilities				(250)	(205)
Proceeds from issuance of HECM securitizations				759	707
Repayment of HECM securitizations				(448)	(484)
Proceeds from issuance of participating interest financing in reverse mortgage interests, net				0	0
Repayment of participating interest financing in reverse mortgage interests				0	0
Proceeds from the issuance of excess spread financing				0
Repayment of excess spread financing				0	0
Settlement of excess spread financing				0	0
Repayment of nonrecourse debt – legacy assets				(7)	(12)
Repurchase of unsecured senior notes				0	0
Surrender of shares relating to stock vesting				0	0
Debt financing costs				0	0
Dividends to non-controlling interests				0	0
Net cash attributable to financing activities				54	6
Net (decrease) increase in cash, cash equivalents, and restricted cash				93	(96)
Cash, cash equivalents, and restricted cash - beginning of period		$ 244		151	263
Cash, cash equivalents, and restricted cash - end of period	$ 244		$ 167	$ 244	$ 167