Regulatory Capital (Tables)

6 Months Ended

Jun. 30, 2014

Regulatory Capital Requirements [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]

The following table summarizes our capital ratios.

	June 30, 2014				December 31, 2013				Required minimum			Well-capitalized minimum
($ in millions)	Amount		Ratio		Amount		Ratio
Risk-based capital
Tier 1 (to risk-weighted assets)
Ally Financial Inc.	$	15,930	12.33	%	$	15,165	11.79	%	4.00	%		6.00	%
Ally Bank	15,739		16.98		15,159		16.73		4.00			6.00
Total (to risk-weighted assets)
Ally Financial Inc.	$	17,056	13.20	%	$	16,405	12.76	%	8.00	%		10.00	%
Ally Bank	16,362		17.65		15,809		17.45		8.00			10.00
Tier 1 leverage (to adjusted quarterly average assets) (a)
Ally Financial Inc.	$	15,930	10.72	%	$	15,165	10.23	%	3.00–4.00%			(b)
Ally Bank	15,739		15.75		15,159		15.77		15.00		(c)	5.00	%
Tier 1 common (to risk-weighted assets)
Ally Financial Inc.	$	12,130	9.39	%	$	11,366	8.84	%	n/a			n/a
Ally Bank	15,739		16.98		15,159		16.73		n/a			n/a

n/a = not applicable

(a) Federal regulatory reporting guidelines require the calculation of adjusted quarterly average assets using a daily average methodology.

(b) There is no Tier 1 leverage component in the definition of "well-capitalized" for a bank holding company.

(c) Ally Bank, in accordance with the CLMA, is required to maintain a Tier 1 leverage ratio of at least 15%.