Regulatory Matters (Tables)

3 Months Ended

Mar. 31, 2022

Banking and Thrift, Other Disclosures [Abstract]

Regulatory Capital Ratios

The following tables present the regulatory capital requirements under the applicable Basel III based U.S. capital rules:

Flagstar Bancorp	Actual				For Capital Adequacy Purposes				Well-Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in millions)
March 31, 2022
Tier 1 capital (to adjusted avg. total assets)	$	2,843	11.83	%	$	961	4.0	%	$	1,201	5.0	%
Common equity Tier 1 capital (to RWA)	2,603		13.89	%	843		4.5	%	1,218		6.5	%
Tier 1 capital (to RWA)	2,843		15.17	%	1,124		6.0	%	1,499		8.0	%
Total capital (to RWA)	3,110		16.59	%	1,499		8.0	%	1,874		10.0	%
December 31, 2021
Tier 1 capital (to adjusted avg. total assets)	$	2,798	10.54	%	$	1,062	4.0	%	$	1,327	5.0	%
Common equity Tier 1 capital (to RWA)	2,558		13.19	%	873		4.5	%	1,261		6.5	%
Tier 1 capital (to RWA)	2,798		14.43	%	1,164		6.0	%	1,552		8.0	%
Total capital (to RWA)	3,080		15.88	%	1,552		8.0	%	1,940		10.0	%

Flagstar Bank	Actual				For Capital Adequacy Purposes				Well-Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in millions)
March 31, 2022
Tier 1 capital (to adjusted avg. total assets)	$	2,758	11.50	%	$	959	4.0	%	$	1,199	5.0	%
Common equity Tier 1 capital (to RWA)	2,758		14.73	%	843		4.5	%	1,217		6.5	%
Tier 1 capital (to RWA)	2,758		14.73	%	1,124		6.0	%	1,498		8.0	%
Total capital (to RWA)	2,875		15.35	%	1,498		8.0	%	1,873		10.0	%
December 31, 2021
Tier 1 capital (to adjusted avg. total assets)	$	2,706	10.21	%	$	1,060	4.0	%	$	1,325	5.0	%
Common equity Tier 1 capital (to RWA)	2,706		13.96	%	872		4.5	%	1,260		6.5	%
Tier 1 capital (to RWA)	2,706		13.96	%	1,163		6.0	%	1,551		8.0	%
Total capital (to RWA)	2,839		14.65	%	1,551		8.0	%	1,938		10.0	%