Significant Accounting Matters (Tables)

6 Months Ended

Jun. 30, 2018

Basic and Diluted EPS Calculations

	Three Months Ended June 30,
	2018				2017
	(in millions, except per share data)
			$/share				$/share
Earnings Attributable to AEP Common Shareholders	$	528.4			$	375.0
Weighted Average Number of Basic Shares Outstanding	492.7		$	1.07	491.8		$	0.76
Weighted Average Dilutive Effect of Stock-Based Awards	0.8		—		0.8		—
Weighted Average Number of Diluted Shares Outstanding	493.5		$	1.07	492.6		$	0.76

	Six Months Ended June 30,
	2018					2017
	(in millions, except per share data)
			$/share					$/share
Earnings Attributable to AEP Common Shareholders	$	982.8				$	967.2
Weighted Average Number of Basic Shares Outstanding	492.5		$	2.00		491.8		$	1.97
Weighted Average Dilutive Effect of Stock-Based Awards	0.8		(0.01		)	0.5		(0.01		)
Weighted Average Number of Diluted Shares Outstanding	493.3		$	1.99		492.3		$	1.96

Supplementary Information [Text Block]

	June 30, 2018
	AEP		AEP Texas		APCo		OPCo
	(in millions)
Cash and Cash Equivalents	$	211.2	$	0.1	$	2.8	$	3.3
Restricted Cash	176.1		131.9		17.7		26.5
Total Cash, Cash Equivalents and Restricted Cash	$	387.3	$	132.0	$	20.5	$	29.8

	December 31, 2017
	AEP		AEP Texas		APCo		OPCo
	(in millions)
Cash and Cash Equivalents	$	214.6	$	2.0	$	2.9	$	3.1
Restricted Cash	198.0		155.2		16.3		26.6
Total Cash, Cash Equivalents and Restricted Cash	$	412.6	$	157.2	$	19.2	$	29.7