Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2011

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Nonvested Restricted Stock Units Activity

Restricted common stock (restricted stock) and restricted stock units (stock units) activity for the year ended December 31, 2011, was as follows:

Restricted stock and stock units outstanding as of January 1, 2011	1,878,022
Granted	915,054
Converted AE restricted stock	645,197
Exercised	(984,543	)
Forfeited	(100,596	)
Restricted stock and stock units outstanding as of December 31, 2011	2,353,134

Schedule of Restricted Stock Grants Under LTIP

Restricted stock grants under the LTIP were as follows:

	2011		2010		2009
Restricted stock granted	297,859		71,752		73,255
Weighted average market price	$	38.44	$	38.43	$	43.68
Weighted average vesting period (years)	2.27		4.74		4.42
Dividends restricted	Yes		Yes		Yes

Schedule of Vesting Activity for Restricted Stock

Vesting activity for restricted stock during 2011 was as follows (forfeitures were not material):

Restricted Stock	Number of Shares	Weighted Average Grant-Date Fair Value
Nonvested as of January 1, 2011	475,914	$	51.26
Nonvested as of December 31, 2011	654,696	$	45.26
Granted in 2011	297,859	$	38.44
Vested in 2011	121,573	$	41.10

Schedule of Restricted Stock Units Granted and Weighted Average Vesting Period

	2011	2010	2009
Restricted stock units granted	617,195	511,418	533,399
Weighted average vesting period (years)	3.00	3.00	3.00

Schedule of Vesting Activity for Stock Units

Vesting activity for stock units during 2011 was as follows (forfeitures were not material):

Restricted Stock Units	Number of Shares	Weighted Average Grant-Date Fair Value
Nonvested as of January 1, 2011	1,402,108	$	48.40
Nonvested as of December 31, 2011	1,566,679	$	40.20
Granted in 2011	617,195	$	36.80
Vested in 2011	444,818	$	37.37

Schedule of Stock Option Activity

Stock option activity during 2011 was as follows:

Stock Option Activity	Number of Shares			Weighted Average Grant-Date Fair Value
Balance, January 1, 2011 (2,889,066 options exercisable)	2,889,066			$	35.18
Options granted	662,122			37.75
Converted Allegheny options	1,805,811			41.75
Options exercised	(973,817	)		31.48
Options forfeited	(127,197	)		70.19
Balance, December 31, 2011 (3,593,863 options exercisable)	4,255,985		—	$	38.17

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

Options outstanding and range of exercise prices as of December 31, 2011, were as follows:

	Options Outstanding and Exercisable
Range of Exercise Prices	Shares	Weighted Average Exercise Price		Remaining Contractual Life
$20.02-$30.74	959,752	$	26.88	1.50
$30.74-$40.93	2,962,802	$	37.42	3.79
$42.72-$51.82	415	$	44.35	2.16
$53.06-$62.97	33,215	$	54.11	3.34
$64.52-$71.82	6,670	$	68.44	4.99
$73.38-$80.47	291,797	$	80.22	3.44
$81.19-$89.59	1,334	$	81.19	5.33
Total	4,255,985	$	38.17	$	3.25