Regulatory Capital and Other Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2021

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, 2021				December 31, 2020				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.	$	15,143	10.34	%	$	14,878	10.64	%	4.50	%	(b)
Ally Bank	17,253		12.39		17,567		13.38		4.50		6.50	%
Tier 1 (to risk-weighted assets)
Ally Financial Inc.	$	17,403	11.89	%	$	17,289	12.37	%	6.00	%	6.00	%
Ally Bank	17,253		12.39		17,567		13.38		6.00		8.00
Total (to risk-weighted assets)
Ally Financial Inc.	$	19,724	13.47	%	$	19,778	14.15	%	8.00	%	10.00	%
Ally Bank	18,995		13.64		19,210		14.63		8.00		10.00
Tier 1 leverage (to adjusted quarterly average assets) (c)
Ally Financial Inc.	$	17,403	9.67	%	$	17,289	9.41	%	4.00	%	(b)
Ally Bank	17,253		10.12		17,567		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 3.5% at both December 31, 2021, and December 31, 2020, and Ally Bank was required to maintain a minimum capital conservation buffer of 2.5% at both December 31, 2021, and December 31, 2020.

(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) (b)			Number of common shares outstanding		Cash dividends declared per common share (c)
($ in millions, except per share data; shares in thousands)	Approximate dollar value		Number of shares	Beginning of period	End of period
2020
First quarter	$	104	3,838	374,332	373,155	$	0.19
Second quarter	—		53	373,155	373,837	0.19
Third quarter	1		9	373,837	373,857	0.19
Fourth quarter	1		37	373,857	374,674	0.19
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

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

(b)On March 17, 2020, we announced the voluntary suspension of our stock-repurchase program through its termination on June 30, 2020. Consistent with the FRB’s restrictions on common-stock repurchases for large firms such as Ally, described above, we did not implement a new stock-repurchase program or repurchase shares of our common stock, except in connection with compensation plans, for the remainder of 2020. Refer to the discussion above for further details about this action.

(c)On January 10, 2022, our Board declared a quarterly cash dividend of $0.30 per share on all common stock, payable on February 15, 2022, to stockholders of record at the close of business on February 1, 2022. Refer to Note 30 for further information regarding this common-stock dividend.