Regulatory Matters (Tables)

3 Months Ended

Mar. 31, 2019

Banking and Thrift [Abstract]

Regulatory Capital Ratios

The following tables present the regulatory capital ratios as of the dates indicated:

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, 2019
Tangible capital (to adjusted avg. total assets)	$	1,520	8.37	%	N/A		N/A		N/A		N/A
Tier 1 leverage (to adjusted avg. total assets)	1,520		8.37	%	$	727	4.0	%	$	909	5.0	%
Common equity Tier 1 capital (to RWA)	1,280		9.69	%	594		4.5	%	859		6.5	%
Tier 1 capital (to RWA)	1,520		11.51	%	793		6.0	%	1,057		8.0	%
Total capital (to RWA)	1,650		12.49	%	1,057		8.0	%	1,321		10.0	%
December 31, 2018
Tangible capital (to adjusted avg. total assets)	$	1,505	8.29	%	N/A		N/A		N/A		N/A
Tier 1 leverage (to adjusted avg. total assets)	1,505		8.29	%	$	726	4.0	%	$	908	5.0	%
Common equity Tier 1 capital (to RWA)	1,265		10.54	%	540		4.5	%	780		6.5	%
Tier 1 capital (to RWA)	1,505		12.54	%	720		6.0	%	960		8.0	%
Total capital (to RWA)	1,637		13.63	%	960		8.0	%	1,201		10.0	%

N/A - Not applicable

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, 2019
Tangible capital (to adjusted avg. total assets)	$	1,641	9.04	%	N/A		N/A		N/A		N/A
Tier 1 leverage (to adjusted avg. total assets)	1,641		9.04	%	$	726	4.0	%	$	908	5.0	%
Common equity tier 1 capital (to RWA)	1,641		12.44	%	594		4.5	%	858		6.5	%
Tier 1 capital (to RWA)	1,641		12.44	%	792		6.0	%	1,055		8.0	%
Total capital (to RWA)	1,771		13.42	%	1,055		8.0	%	1,319		10.0	%
December 31, 2018
Tangible capital (to adjusted avg. total assets)	$	1,574	8.67	%	N/A		N/A		N/A		N/A
Tier 1 leverage (to adjusted avg. total assets)	1,574		8.67	%	$	726	4.0	%	$	908	5.0	%
Common equity tier 1 capital (to RWA)	1,574		13.12	%	540		4.5	%	780		6.5	%
Tier 1 capital (to RWA)	1,574		13.12	%	720		6.0	%	960		8.0	%
Total capital (to RWA)	1,705		14.21	%	960		8.0	%	1,200		10.0	%

N/A - Not applicable