Stock-Based Compensation (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Additional disclosures
Total unrecognized compensation cost related to nonvested share-based compensation arrangements granted	$ 17
Expected weighted-average period of recognition of unrecognized compensation cost	2 years
Total fair value of shares vested	20	19	14
Compensation cost that has been charged against income	25	32	23
Total income tax benefit recognized	10	13	9
ARIZONA PUBLIC SERVICE COMPANY
Additional disclosures
Compensation cost that has been charged against income	25	32	22
Stock Options
Stock option activity under prior equity incentive plans
Outstanding at the beginning of the period (in shares)	7,925
Exercised (in shares)	3,625
Forfeited or expired (in shares)	4,300
Outstanding at the end of the period (in shares)		7,925
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 32.29
Exercised (in dollars per share)	$ 32.29
Forfeited or expired (in dollars per share)	$ 32.29
Outstanding at the end of the period (in dollars per share)		$ 32.29
Additional disclosures
Cash received from options exercised	$ 0.1	$ 0.5	$ 1.8