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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Earnings Per Share

Computation of Earnings Per Share

			Third Quarter												Nine Months
			2025						2024						2025						2024
			(in millions, except per share amounts)
Basic Earnings Per Share (EPS):
Net income (loss) attributable to AGL			$	105					$	171					$	384					$	358
Less: Distributed and undistributed income (loss) available to nonvested shareholders			1						2						2						3
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic			$	104					$	169					$	382					$	355
Basic shares			47.4						52.4						48.8						54.1
Basic EPS			$	2.20					$	3.23					$	7.82					$	6.57
Diluted EPS:
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic			$	104					$	169					$	382					$	355
Plus: Re-allocation of undistributed income (loss) available to nonvested shareholders of AGL and subsidiaries			—						—						—						—
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, diluted			$	104					$	169					$	382					$	355
Basic shares			47.4						52.4						48.8						54.1
Dilutive securities:
Restricted stock awards			0.6						1.0						0.6						1.1
Diluted shares			48.0						53.4						49.4						55.2
Diluted EPS			$	2.18					$	3.17					$	7.73					$	6.44
Potentially dilutive securities excluded from computation of EPS because of antidilutive effect			—						—						0.1						0.1

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Computation of Earnings Per Share

			Third Quarter												Nine Months
			2025						2024						2025						2024
			(in millions, except per share amounts)
Basic Earnings Per Share (EPS):
Net income (loss) attributable to AGL			$	105					$	171					$	384					$	358
Less: Distributed and undistributed income (loss) available to nonvested shareholders			1						2						2						3
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic			$	104					$	169					$	382					$	355
Basic shares			47.4						52.4						48.8						54.1
Basic EPS			$	2.20					$	3.23					$	7.82					$	6.57
Diluted EPS:
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic			$	104					$	169					$	382					$	355
Plus: Re-allocation of undistributed income (loss) available to nonvested shareholders of AGL and subsidiaries			—						—						—						—
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, diluted			$	104					$	169					$	382					$	355
Basic shares			47.4						52.4						48.8						54.1
Dilutive securities:
Restricted stock awards			0.6						1.0						0.6						1.1
Diluted shares			48.0						53.4						49.4						55.2
Diluted EPS			$	2.18					$	3.17					$	7.73					$	6.44
Potentially dilutive securities excluded from computation of EPS because of antidilutive effect			—						—						0.1						0.1

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- References

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

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