Regulatory Capital and Other Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2022

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The following table summarizes our capital ratios under U.S. Basel III.

	December 31, 2022				December 31, 2021				Required minimum (a)		Well-capitalized minimum
($ in millions)	Amount		Ratio		Amount		Ratio
Capital ratios
Common Equity Tier 1 (to risk-weighted assets)
Ally Financial Inc.	$	14,592	9.27	%	$	15,143	10.34	%	4.50	%	(b)
Ally Bank	17,011		11.38		17,253		12.39		4.50		6.50	%
Tier 1 (to risk-weighted assets)
Ally Financial Inc.	$	16,867	10.72	%	$	17,403	11.89	%	6.00	%	6.00	%
Ally Bank	17,011		11.38		17,253		12.39		6.00		8.00
Total (to risk-weighted assets)
Ally Financial Inc.	$	19,209	12.21	%	$	19,724	13.47	%	8.00	%	10.00	%
Ally Bank	18,888		12.64		18,995		13.64		8.00		10.00
Tier 1 leverage (to adjusted quarterly average assets) (c)
Ally Financial Inc.	$	16,867	8.65	%	$	17,403	9.67	%	4.00	%	(b)
Ally Bank	17,011		9.23		17,253		10.12		4.00		5.00	%

(a)In addition to the minimum risk-based capital requirements for the Common Equity Tier 1 capital, Tier 1 capital, and total capital ratios, Ally was required to maintain a minimum capital conservation buffer of 2.5% and 3.5% at December 31, 2022, and December 31, 2021, respectively, and Ally Bank was required to maintain a minimum capital conservation buffer of 2.5% at both December 31, 2022, and December 31, 2021.

(b)Currently, there is no ratio component for determining whether a BHC is “well-capitalized.”

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

Schedule of Common Share Distribution Activity

The following table presents information related to our common stock and distributions to our common stockholders.

	Common stock repurchased during period (a)			Number of common shares outstanding		Cash dividends declared per common share (b)
($ in millions, except per share data; shares in thousands)	Approximate dollar value		Number of shares	Beginning of period	End of period
2021
First quarter	$	219	5,276	374,674	371,805	$	0.19
Second quarter	502		9,641	371,805	362,639	0.19
Third quarter	679		13,055	362,639	349,599	0.25
Fourth quarter	594		12,046	349,599	337,941	0.25
2022
First quarter	$	584	12,548	337,941	327,306	$	0.30
Second quarter	600		15,031	327,306	312,781	0.30
Third quarter	415		12,468	312,781	300,335	0.30
Fourth quarter	51		1,731	300,335	299,324	0.30

(a)Includes shares of common stock withheld to cover income taxes owed by participants in our share-based incentive plans.

(b)On January 17, 2023, our Board declared a quarterly cash dividend of $0.30 per share on all common stock, payable on February 15, 2023, to stockholders of record at the close of business on February 1, 2023. Refer to Note 30 for further information regarding this common-stock dividend.