Guarantor Financial Statement Information - Consolidating Statements of Cash Flow (Details) - USD ($) $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended							5 Months Ended	7 Months Ended	12 Months Ended
	Jul. 31, 2018	Sep. 30, 2018	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Jul. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net income (loss) attributable to Nationstar		$ 1,020	$ (136)							$ 884
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes										(1,021)
Net income (loss) attributable to non-controlling interests		0	0							0
(Gain) loss from subsidiaries										0
Net gain on mortgage loans held for sale		(83)	(93)							(176)
Interest income on reverse mortgage interests										(206)
(Gain) loss on sale of assets										0
MSL related increased obligation										0
Loss on impairment of assets										0
Provision for servicing reserves										38
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities										225
Fair value changes in excess spread financing										5
Fair value changes in mortgage servicing rights financing liability										6
Fair value changes in mortgage loans held for investment										(2)
Amortization of premiums, net of discount accretion										9
Depreciation and amortization for property and equipment and intangible assets										39
Share-based compensation										2
Other loss										0
Repurchases of forward loan assets out of Ginnie Mae securitizations										(527)
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party										(8,888)
Mortgage loans originated and purchased, net of fees, and other purchase-related activities										(8,888)
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment										9,405
Excess tax benefit (deficiency) from share based compensation										0
Changes in assets and liabilities:
Advances and other receivables, net										43
Reverse mortgage interests, net										1,544
Other assets										(61)
Payables and accrued liabilities										(68)
Net cash attributable to operating activities										1,251
Investing Activities
Acquisition, net of cash acquired										(33)
Property and equipment additions, net of disposals										(15)
Purchase of forward mortgage servicing rights, net of liabilities incurred										(307)
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										105
Proceeds on sale of assets										0
Purchase of cost-method investments										0
Net cash attributable to investing activities										(250)
Financing Activities
Increase (decrease) in warehouse facilities										(351)
Increase (decrease) in advance facilities										45
Proceeds from issuance of HECM securitizations										343
Repayment of HECM securitizations										(374)
Proceeds from issuance of participating interest financing in reverse mortgage interests										112
Repayment of participating interest financing in reverse mortgage interests										(943)
Proceeds from issuance of excess spread financing										255
Repayment of excess spread financing										(38)
Settlement of excess spread financing										(77)
Repayment of nonrecourse debt - legacy assets										(6)
Redemption and repayment of unsecured senior notes										(1,030)
Repurchase of unsecured senior notes										0
Repurchase of common stock										0
Excess tax benefit (deficiency) from share based compensation										0
Surrender of shares relating to stock vesting										0
Proceeds from non-controlling interests										3
Debt financing costs										(2)
Dividends to non-controlling interests										0
Net cash attributable to financing activities										(2,063)
Net (decrease) increase in cash and cash equivalents										(1,062)
Cash and cash equivalents - beginning of year		1,623								1,623
Cash and cash equivalents - end of year	$ 1,623		561							561	$ 1,623
Reportable legal entities | Mr. Cooper
Operating Activities
Net income (loss) attributable to Nationstar										884
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes										(971)
Net income (loss) attributable to non-controlling interests										0
(Gain) loss from subsidiaries										44
Net gain on mortgage loans held for sale										0
Interest income on reverse mortgage interests										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
Fair value changes in mortgage servicing rights financing liability										0
Fair value changes in mortgage loans held for investment										0
Amortization of premiums, net of discount accretion										3
Depreciation and amortization for property and equipment and intangible assets										0
Share-based compensation										0
Other loss										0
Repurchases of forward loan assets out of Ginnie Mae securitizations										0
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party										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, net										0
Reverse mortgage interests, net										0
Other assets										1
Payables and accrued liabilities										28
Net cash attributable to operating activities										(11)
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
Increase (decrease) in advance facilities										0
Proceeds from issuance of HECM securitizations										0
Repayment of HECM securitizations										0
Proceeds from issuance of participating interest financing in reverse mortgage interests										0
Repayment of participating interest financing in reverse mortgage interests										0
Proceeds from 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
Proceeds from non-controlling interests										0
Debt financing costs										0
Net cash attributable to financing activities										0
Net (decrease) increase in cash and cash equivalents										(11)
Cash and cash equivalents - beginning of year		11								11
Cash and cash equivalents - end of year	11		0							0	11
Reportable legal entities | Issuer
Operating Activities
Net income (loss) attributable to Nationstar										(44)
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes										(49)
Net income (loss) attributable to non-controlling interests										0
(Gain) loss from subsidiaries										(2)
Net gain on mortgage loans held for sale										(175)
Interest income on reverse mortgage interests										(206)
Provision for servicing reserves										38
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities										225
Fair value changes in excess spread financing										6
Fair value changes in mortgage servicing rights financing liability										6
Fair value changes in mortgage loans held for investment										0
Amortization of premiums, net of discount accretion										7
Depreciation and amortization for property and equipment and intangible assets										33
Share-based compensation										1
Other loss										1
Repurchases of forward loan assets out of Ginnie Mae securitizations										(527)
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party										(8,888)
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment										9,389
Changes in assets and liabilities:
Advances and other receivables, net										43
Reverse mortgage interests, net										1,569
Other assets										(18)
Payables and accrued liabilities										(130)
Net cash attributable to operating activities										1,279
Investing Activities
Acquisition, net of cash acquired										0
Property and equipment additions, net of disposals										(18)
Purchase of forward mortgage servicing rights, net of liabilities incurred										(313)
Proceeds on sale of forward and reverse mortgage servicing rights										105
Net cash attributable to investing activities										(226)
Financing Activities
Increase (decrease) in warehouse facilities										(351)
Increase (decrease) in advance facilities										40
Proceeds from issuance of HECM securitizations										0
Repayment of HECM securitizations										0
Proceeds from issuance of participating interest financing in reverse mortgage interests										112
Repayment of participating interest financing in reverse mortgage interests										(943)
Proceeds from issuance of excess spread financing										255
Repayment of excess spread financing										(38)
Settlement of excess spread financing										(77)
Repayment of nonrecourse debt - legacy assets										0
Redemption and repayment of unsecured senior notes										(1,030)
Proceeds from non-controlling interests										3
Debt financing costs										(3)
Net cash attributable to financing activities										(2,032)
Net (decrease) increase in cash and cash equivalents										(979)
Cash and cash equivalents - beginning of year		1,358								1,358
Cash and cash equivalents - end of year	1,358		379							379	1,358
Reportable legal entities | Guarantor (Subsidiaries of Issuer)
Operating Activities
Net income (loss) attributable to Nationstar										6
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes										0
Net income (loss) attributable to non-controlling interests										0
(Gain) loss from subsidiaries										0
Net gain on mortgage loans held for sale										0
Interest income on reverse mortgage interests										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
Fair value changes in mortgage servicing rights financing liability										0
Fair value changes in mortgage loans held for investment										0
Amortization of premiums, net of discount accretion										0
Depreciation and amortization for property and equipment and intangible assets										0
Share-based compensation										0
Other loss										0
Repurchases of forward loan assets out of Ginnie Mae securitizations										0
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party										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, net										0
Reverse mortgage interests, net										0
Other assets										(6)
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
Increase (decrease) in advance facilities										0
Proceeds from issuance of HECM securitizations										0
Repayment of HECM securitizations										0
Proceeds from issuance of participating interest financing in reverse mortgage interests										0
Repayment of participating interest financing in reverse mortgage interests										0
Proceeds from 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
Proceeds from non-controlling interests										0
Debt financing costs										0
Net cash attributable to financing activities										0
Net (decrease) increase in cash and cash equivalents										0
Cash and cash equivalents - beginning of year		1								1
Cash and cash equivalents - end of year	1		1							1	1
Reportable legal entities | Non-Guarantor (Subsidiaries of Issuer)
Operating Activities
Net income (loss) attributable to Nationstar										(4)
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes										(1)
Net income (loss) attributable to non-controlling interests										0
(Gain) loss from subsidiaries										0
Net gain on mortgage loans held for sale										(1)
Interest income on reverse mortgage interests										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										(1)
Fair value changes in mortgage servicing rights financing liability										0
Fair value changes in mortgage loans held for investment										(2)
Amortization of premiums, net of discount accretion										(1)
Depreciation and amortization for property and equipment and intangible assets										6
Share-based compensation										1
Other loss										(1)
Repurchases of forward loan assets out of Ginnie Mae securitizations										0
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party										0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment										16
Changes in assets and liabilities:
Advances and other receivables, net										0
Reverse mortgage interests, net										(25)
Other assets										(38)
Payables and accrued liabilities										34
Net cash attributable to operating activities										(17)
Investing Activities
Acquisition, net of cash acquired										(33)
Property and equipment additions, net of disposals										3
Purchase of forward mortgage servicing rights, net of liabilities incurred										6
Proceeds on sale of forward and reverse mortgage servicing rights										0
Net cash attributable to investing activities										(24)
Financing Activities
Increase (decrease) in warehouse facilities										0
Increase (decrease) in advance facilities										5
Proceeds from issuance of HECM securitizations										343
Repayment of HECM securitizations										(374)
Proceeds from issuance of participating interest financing in reverse mortgage interests										0
Repayment of participating interest financing in reverse mortgage interests										0
Proceeds from issuance of excess spread financing										0
Repayment of excess spread financing										0
Settlement of excess spread financing										0
Repayment of nonrecourse debt - legacy assets										(6)
Redemption and repayment of unsecured senior notes										0
Proceeds from non-controlling interests										0
Debt financing costs										1
Net cash attributable to financing activities										(31)
Net (decrease) increase in cash and cash equivalents										(72)
Cash and cash equivalents - beginning of year		253								253
Cash and cash equivalents - end of year	253		181							181	253
Eliminations
Operating Activities
Net income (loss) attributable to Nationstar										42
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes										0
Net income (loss) attributable to non-controlling interests										0
(Gain) loss from subsidiaries										(42)
Net gain on mortgage loans held for sale										0
Interest income on reverse mortgage interests										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
Fair value changes in mortgage servicing rights financing liability										0
Fair value changes in mortgage loans held for investment										0
Amortization of premiums, net of discount accretion										0
Depreciation and amortization for property and equipment and intangible assets										0
Share-based compensation										0
Other loss										0
Repurchases of forward loan assets out of Ginnie Mae securitizations										0
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party										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, net										0
Reverse mortgage interests, net										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
Increase (decrease) in advance facilities										0
Proceeds from issuance of HECM securitizations										0
Repayment of HECM securitizations										0
Proceeds from issuance of participating interest financing in reverse mortgage interests										0
Repayment of participating interest financing in reverse mortgage interests										0
Proceeds from 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
Proceeds from non-controlling interests										0
Debt financing costs										0
Net cash attributable to financing activities										0
Net (decrease) increase in cash and cash equivalents										0
Cash and cash equivalents - beginning of year		0								0
Cash and cash equivalents - end of year	0		$ 0							0	0
Predecessor
Operating Activities
Net income (loss) attributable to Nationstar	(64)			$ 58	$ 160	$ 41	$ 7	$ (20)	$ 2		154	$ 30	$ 19
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes											63	(46)	(5)
Net income (loss) attributable to non-controlling interests	0			0	0	0	0	1	0		0	1	(3)
(Gain) loss from subsidiaries											0	0	0
Net gain on mortgage loans held for sale	(44)			$ (127)	(124)	(142)	$ (154)	$ (167)	(144)		(295)	(607)	(793)
Interest income on reverse mortgage interests											(274)	(490)	(344)
(Gain) loss on sale of assets											(9)	(8)	2
MSL related increased obligation											59	0	0
Loss on impairment of assets											0	0	25
Provision for servicing reserves											70	148	108
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities											(177)	430	484
Fair value changes in excess spread financing											81	12	25
Fair value changes in mortgage servicing rights financing liability											16	(17)	(42)
Fair value changes in mortgage loans held for investment											0	0	0
Amortization of premiums, net of discount accretion											8	82	64
Depreciation and amortization for property and equipment and intangible assets											33	59	63
Share-based compensation											17	17	21
Other loss											3	6	0
Repurchases of forward loan assets out of Ginnie Mae securitizations											(544)	(1,249)	(1,432)
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party											(12,328)
Mortgage loans originated and purchased, net of fees, and other purchase-related activities											(12,328)	(19,159)	(20,410)
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment											13,392	20,776	22,031
Excess tax benefit (deficiency) from share based compensation											0	(1)	4
Changes in assets and liabilities:
Advances and other receivables, net											377	(30)	582
Reverse mortgage interests, net											1,601	1,672	572
Other assets											(41)	(75)	(25)
Payables and accrued liabilities											88	(192)	26
Net cash attributable to operating activities											2,294	1,359	972
Investing Activities
Acquisition, net of cash acquired											0	0	0
Property and equipment additions, net of disposals											(40)	(42)	(62)
Purchase of forward mortgage servicing rights, net of liabilities incurred											(134)	(63)	(144)
Net payment related to acquisition of HECM related receivables											(1)	0	0
Net proceeds from acquisition of reverse mortgage servicing portfolio and HECM related receivables											0	16	(3,600)
Proceeds on sale of forward and reverse mortgage servicing rights											0	71	68
Proceeds on sale of assets											13	16	0
Purchase of cost-method investments											0	(4)	0
Net cash attributable to investing activities											(162)	(6)	(3,738)
Financing Activities
Increase (decrease) in warehouse facilities											(585)	863	529
Increase (decrease) in advance facilities											(305)	(241)	(550)
Proceeds from issuance of HECM securitizations											759	707	728
Repayment of HECM securitizations											(448)	(572)	(713)
Proceeds from issuance of participating interest financing in reverse mortgage interests											208	575	4,124
Repayment of participating interest financing in reverse mortgage interests											(1,599)	(2,597)	(1,185)
Proceeds from issuance of excess spread financing											70	0	155
Repayment of excess spread financing											(3)	(23)	(198)
Settlement of excess spread financing											(105)	(207)	0
Repayment of nonrecourse debt - legacy assets											(7)	(15)	(18)
Repurchase of unsecured senior notes											(62)	(123)	(40)
Repurchase of common stock											0	0	(114)
Excess tax benefit (deficiency) from share based compensation											0	0	(4)
Surrender of shares relating to stock vesting											(9)	(4)	(3)
Proceeds from non-controlling interests											0	0	0
Debt financing costs											(24)	(13)	(13)
Dividends to non-controlling interests											(1)	(5)	0
Net cash attributable to financing activities											(2,111)	(1,655)	2,698
Net (decrease) increase in cash and cash equivalents											21	(302)	(68)
Cash and cash equivalents - beginning of year		596			575				877	596	575	877	945
Cash and cash equivalents - end of year	596					575					596	575	877
Predecessor | Reportable legal entities | Mr. Cooper
Operating Activities
Net income (loss) attributable to Nationstar											154	30	19
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes											0	0	0
Net income (loss) attributable to non-controlling interests											0	0	0
(Gain) loss from subsidiaries											(181)	(30)	(19)
Net gain on mortgage loans held for sale											0	0	0
Interest income on reverse mortgage interests											0	0	0
(Gain) loss on sale of assets											0	0	0
MSL related increased obligation											0
Loss on impairment of assets													0
Provision for servicing reserves											0	0	0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities											0	0	0
Fair value changes in excess spread financing											0	0	0
Fair value changes in mortgage servicing rights financing liability											0	0	0
Amortization of premiums, net of discount accretion											0	0	0
Depreciation and amortization for property and equipment and intangible assets											0	0	0
Share-based compensation											0	0	0
Other loss											0	0
Repurchases of forward loan assets out of Ginnie Mae securitizations											0	0	0
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party											0
Mortgage loans originated and purchased, net of fees, and other purchase-related activities												0	0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment											0	0	0
Excess tax benefit (deficiency) from share based compensation												0	0
Changes in assets and liabilities:
Advances and other receivables, net											0	0	0
Reverse mortgage interests, net											0	0	0
Other assets											9	4	117
Payables and accrued liabilities											27	0	0
Net cash attributable to operating activities											9	4	117
Investing Activities
Property and equipment additions, net of disposals											0	0	0
Purchase of forward mortgage servicing rights, net of liabilities incurred											0	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	0
Proceeds on sale of forward and reverse mortgage servicing rights												0	0
Proceeds on sale of assets											0	0
Purchase of cost-method investments												0
Net cash attributable to investing activities											0	0	0
Financing Activities
Increase (decrease) in warehouse facilities											0	0	0
Increase (decrease) in advance facilities											0	0	0
Proceeds from issuance of HECM securitizations											0	0	0
Repayment of HECM securitizations											0	0	0
Proceeds from issuance of participating interest financing in reverse mortgage interests											0	0	0
Repayment of participating interest financing in reverse mortgage interests											0	0	0
Proceeds from issuance of excess spread financing											0		0
Repayment of excess spread financing											0	0	0
Settlement of excess spread financing											0	0
Repayment of nonrecourse debt - legacy assets											0	0	0
Repurchase of unsecured senior notes											0	0	0
Repurchase of common stock											0		(114)
Excess tax benefit (deficiency) from share based compensation													0
Surrender of shares relating to stock vesting											(9)	(4)	(3)
Debt financing costs											0	0	0
Dividends to non-controlling interests											0	0
Net cash attributable to financing activities											(9)	(4)	(117)
Net (decrease) increase in cash and cash equivalents											0	0	0
Cash and cash equivalents - beginning of year		0			0				0	0	0	0	0
Cash and cash equivalents - end of year	0					0					0	0	0
Predecessor | Reportable legal entities | Issuer
Operating Activities
Net income (loss) attributable to Nationstar											181	30	19
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes											63	(46)	(5)
Net income (loss) attributable to non-controlling interests											0	1	(3)
(Gain) loss from subsidiaries											(56)	(53)	(44)
Net gain on mortgage loans held for sale											(295)	(606)	(764)
Interest income on reverse mortgage interests											(274)	(490)	(344)
(Gain) loss on sale of assets											0	1	2
MSL related increased obligation											59
Loss on impairment of assets													25
Provision for servicing reserves											70	148	108
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities											(178)	430	484
Fair value changes in excess spread financing											81	15	3
Fair value changes in mortgage servicing rights financing liability											16	(17)	(42)
Amortization of premiums, net of discount accretion											11	73	(9,907)
Depreciation and amortization for property and equipment and intangible assets											26	45	43
Share-based compensation											16	12	15
Other loss											3	6
Repurchases of forward loan assets out of Ginnie Mae securitizations											(544)	(1,249)	(1,432)
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party											(12,328)
Mortgage loans originated and purchased, net of fees, and other purchase-related activities												(19,159)	(19,616)
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment											13,381	20,760	31,024
Excess tax benefit (deficiency) from share based compensation												(1)	4
Changes in assets and liabilities:
Advances and other receivables, net											377	(30)	582
Reverse mortgage interests, net											1,866	1,829	607
Other assets											(294)	(103)	(707)
Payables and accrued liabilities											65	(179)	46
Net cash attributable to operating activities											2,246	1,417	98
Investing Activities
Property and equipment additions, net of disposals											(35)	(37)	(55)
Purchase of forward mortgage servicing rights, net of liabilities incurred											(127)	(56)	(120)
Net payment related to acquisition of HECM related receivables											(1)
Net proceeds from acquisition of reverse mortgage servicing portfolio and HECM related receivables												16	(3,600)
Proceeds on sale of forward and reverse mortgage servicing rights												71	68
Proceeds on sale of assets											0	16
Purchase of cost-method investments												(4)
Net cash attributable to investing activities											(163)	6	(3,707)
Financing Activities
Increase (decrease) in warehouse facilities											(585)	863	637
Increase (decrease) in advance facilities											(55)	(81)	(51)
Proceeds from issuance of HECM securitizations											0	0	0
Repayment of HECM securitizations											0	(1)	0
Proceeds from issuance of participating interest financing in reverse mortgage interests											208	575	4,124
Repayment of participating interest financing in reverse mortgage interests											(1,599)	(2,597)	(1,185)
Proceeds from issuance of excess spread financing											70		155
Repayment of excess spread financing											(3)	(23)	(198)
Settlement of excess spread financing											(105)	(207)
Repayment of nonrecourse debt - legacy assets											0	0	0
Repurchase of unsecured senior notes											(62)	(123)	(40)
Repurchase of common stock											0		0
Excess tax benefit (deficiency) from share based compensation													(4)
Surrender of shares relating to stock vesting											0	0	0
Debt financing costs											(24)	(13)	(13)
Dividends to non-controlling interests											(1)	(5)
Net cash attributable to financing activities											(2,156)	(1,612)	3,425
Net (decrease) increase in cash and cash equivalents											(73)	(189)	(184)
Cash and cash equivalents - beginning of year		350			423				612	350	423	612	796
Cash and cash equivalents - end of year	350					423					350	423	612
Predecessor | Reportable legal entities | Guarantor (Subsidiaries of Issuer)
Operating Activities
Net income (loss) attributable to Nationstar											12	12	20
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes											0	0	0
Net income (loss) attributable to non-controlling interests											0	0	0
(Gain) loss from subsidiaries											0	0	0
Net gain on mortgage loans held for sale											0	0	0
Interest income on reverse mortgage interests											0	0	0
(Gain) loss on sale of assets											0	0	0
MSL related increased obligation											0
Loss on impairment of assets													0
Provision for servicing reserves											0	0	0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities											0	0	0
Fair value changes in excess spread financing											0	0	0
Fair value changes in mortgage servicing rights financing liability											0	0	0
Amortization of premiums, net of discount accretion											0	0	0
Depreciation and amortization for property and equipment and intangible assets											0	0	0
Share-based compensation											0	0	0
Other loss											0	0
Repurchases of forward loan assets out of Ginnie Mae securitizations											0	0	0
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party											0
Mortgage loans originated and purchased, net of fees, and other purchase-related activities												0	0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment											0	0	0
Excess tax benefit (deficiency) from share based compensation												0	0
Changes in assets and liabilities:
Advances and other receivables, net											0	0	0
Reverse mortgage interests, net											0	0	0
Other assets											(12)	(12)	(21)
Payables and accrued liabilities											0	(1)	1
Net cash attributable to operating activities											0	(1)	0
Investing Activities
Property and equipment additions, net of disposals											0	0	1
Purchase of forward mortgage servicing rights, net of liabilities incurred											0	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	0
Proceeds on sale of forward and reverse mortgage servicing rights												0	0
Proceeds on sale of assets											0	0
Purchase of cost-method investments												0
Net cash attributable to investing activities											0	0	1
Financing Activities
Increase (decrease) in warehouse facilities											0	0	0
Increase (decrease) in advance facilities											0	0	0
Proceeds from issuance of HECM securitizations											0	0	0
Repayment of HECM securitizations											0	0	0
Proceeds from issuance of participating interest financing in reverse mortgage interests											0	0	0
Repayment of participating interest financing in reverse mortgage interests											0	0	0
Proceeds from issuance of excess spread financing											0		0
Repayment of excess spread financing											0	0	0
Settlement of excess spread financing											0	0
Repayment of nonrecourse debt - legacy assets											0	0	0
Repurchase of unsecured senior notes											0	0	0
Repurchase of common stock											0		0
Excess tax benefit (deficiency) from share based compensation													0
Surrender of shares relating to stock vesting											0	0	0
Debt financing costs											0	0	0
Dividends to non-controlling interests											0	0
Net cash attributable to financing activities											0	0	0
Net (decrease) increase in cash and cash equivalents											0	(1)	1
Cash and cash equivalents - beginning of year		1			1				2	1	1	2	1
Cash and cash equivalents - end of year	1					1					1	1	2
Predecessor | Reportable legal entities | Non-Guarantor (Subsidiaries of Issuer)
Operating Activities
Net income (loss) attributable to Nationstar											44	41	24
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes											0	0	0
Net income (loss) attributable to non-controlling interests											0	0	0
(Gain) loss from subsidiaries											0	0	0
Net gain on mortgage loans held for sale											0	(1)	(29)
Interest income on reverse mortgage interests											0	0	0
(Gain) loss on sale of assets											(9)	(9)	0
MSL related increased obligation											0
Loss on impairment of assets													0
Provision for servicing reserves											0	0	0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities											1	0	0
Fair value changes in excess spread financing											0	(3)	22
Fair value changes in mortgage servicing rights financing liability											0	0	0
Amortization of premiums, net of discount accretion											(3)	9	9,971
Depreciation and amortization for property and equipment and intangible assets											7	14	20
Share-based compensation											1	5	6
Other loss											0	0
Repurchases of forward loan assets out of Ginnie Mae securitizations											0	0	0
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party											0
Mortgage loans originated and purchased, net of fees, and other purchase-related activities												0	(794)
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment											11	16	(8,993)
Excess tax benefit (deficiency) from share based compensation												0	0
Changes in assets and liabilities:
Advances and other receivables, net											0	0	0
Reverse mortgage interests, net											(265)	(157)	(35)
Other assets											256	36	586
Payables and accrued liabilities											(4)	(12)	(21)
Net cash attributable to operating activities											39	(61)	757
Investing Activities
Property and equipment additions, net of disposals											(5)	(5)	(8)
Purchase of forward mortgage servicing rights, net of liabilities incurred											(7)	(7)	(24)
Net payment related to acquisition of HECM related receivables											0
Net proceeds from acquisition of reverse mortgage servicing portfolio and HECM related receivables												0	0
Proceeds on sale of forward and reverse mortgage servicing rights												0	0
Proceeds on sale of assets											13	0
Purchase of cost-method investments												0
Net cash attributable to investing activities											1	(12)	(32)
Financing Activities
Increase (decrease) in warehouse facilities											0	0	(108)
Increase (decrease) in advance facilities											(250)	(160)	(499)
Proceeds from issuance of HECM securitizations											759	707	728
Repayment of HECM securitizations											(448)	(571)	(713)
Proceeds from issuance of participating interest financing in reverse mortgage interests											0	0	0
Repayment of participating interest financing in reverse mortgage interests											0	0	0
Proceeds from issuance of excess spread financing											0		0
Repayment of excess spread financing											0	0	0
Settlement of excess spread financing											0	0
Repayment of nonrecourse debt - legacy assets											(7)	(15)	(18)
Repurchase of unsecured senior notes											0	0	0
Repurchase of common stock											0		0
Excess tax benefit (deficiency) from share based compensation													0
Surrender of shares relating to stock vesting											0	0	0
Debt financing costs											0	0	0
Dividends to non-controlling interests											0	0
Net cash attributable to financing activities											54	(39)	(610)
Net (decrease) increase in cash and cash equivalents											94	(112)	115
Cash and cash equivalents - beginning of year		245			151				263	245	151	263	148
Cash and cash equivalents - end of year	245					151					245	151	263
Predecessor | Eliminations
Operating Activities
Net income (loss) attributable to Nationstar											(237)	(83)	(63)
Adjustment to reconcile net income (loss) to net cash attributable to operating activities:
Provision for deferred income taxes											0	0	0
Net income (loss) attributable to non-controlling interests											0	0	0
(Gain) loss from subsidiaries											237	83	63
Net gain on mortgage loans held for sale											0	0	0
Interest income on reverse mortgage interests											0	0	0
(Gain) loss on sale of assets											0	0	0
MSL related increased obligation											0
Loss on impairment of assets													0
Provision for servicing reserves											0	0	0
Fair value changes and amortization/accretion of mortgage servicing rights/liabilities											0	0	0
Fair value changes in excess spread financing											0	0	0
Fair value changes in mortgage servicing rights financing liability											0	0	0
Amortization of premiums, net of discount accretion											0	0	0
Depreciation and amortization for property and equipment and intangible assets											0	0	0
Share-based compensation											0	0	0
Other loss											0	0
Repurchases of forward loan assets out of Ginnie Mae securitizations											0	0	0
Repurchases of reverse loan assets out of Ginnie Mae securitizations, net of assignments to a third party											0
Mortgage loans originated and purchased, net of fees, and other purchase-related activities												0	0
Sales proceeds and loan payment proceeds for mortgage loans held for sale and held for investment											0	0	0
Excess tax benefit (deficiency) from share based compensation												0	0
Changes in assets and liabilities:
Advances and other receivables, net											0	0	0
Reverse mortgage interests, net											0	0	0
Other assets											0	0	0
Payables and accrued liabilities											0	0	0
Net cash attributable to operating activities											0	0	0
Investing Activities
Property and equipment additions, net of disposals											0	0	0
Purchase of forward mortgage servicing rights, net of liabilities incurred											0	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	0
Proceeds on sale of forward and reverse mortgage servicing rights												0	0
Proceeds on sale of assets											0	0
Purchase of cost-method investments												0
Net cash attributable to investing activities											0	0	0
Financing Activities
Increase (decrease) in warehouse facilities											0	0	0
Increase (decrease) in advance facilities											0	0	0
Proceeds from issuance of HECM securitizations											0	0	0
Repayment of HECM securitizations											0	0	0
Proceeds from issuance of participating interest financing in reverse mortgage interests											0	0	0
Repayment of participating interest financing in reverse mortgage interests											0	0	0
Proceeds from issuance of excess spread financing											0		0
Repayment of excess spread financing											0	0	0
Settlement of excess spread financing											0	0
Repayment of nonrecourse debt - legacy assets											0	0	0
Repurchase of unsecured senior notes											0	0	0
Repurchase of common stock											0		0
Excess tax benefit (deficiency) from share based compensation													0
Surrender of shares relating to stock vesting											0	0	0
Debt financing costs											0	0	0
Dividends to non-controlling interests											0	0
Net cash attributable to financing activities											0	0	0
Net (decrease) increase in cash and cash equivalents											0	0	0
Cash and cash equivalents - beginning of year		$ 0			$ 0				$ 0	$ 0	0	0	0
Cash and cash equivalents - end of year	$ 0					$ 0					$ 0	$ 0	$ 0