Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2012

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, 2012, was as follows:

Outstanding as of January 1, 2012	2,353,134
Granted	915,891
Exercised	(907,285	)
Forfeited	(181,318	)
Outstanding as of December 31, 2012	2,180,422

Schedule of Restricted Stock Grants Under LTIP

Restricted stock grants under the LTIP were as follows:

	2012		2011		2010
Restricted stock granted	263,771		297,859		71,752
Weighted average market price	$	44.82	$	38.44	$	38.43
Weighted average vesting period (years)	3.09		2.27		4.74
Dividends restricted	Yes		Yes		Yes

Schedule of Vesting Activity for Restricted Stock

Vesting activity for restricted stock during 2012 was as follows (forfeitures were not material):

Restricted Stock	Number of Shares	Weighted Average Grant-Date Fair Value
Nonvested as of January 1, 2012	654,696	$	45.26
Nonvested as of December 31, 2012	551,678	$	47.21
Granted in 2012	263,771	$	44.82
Vested in 2012	380,970	$	42.75

Schedule of Restricted Stock Units Granted and Weighted Average Vesting Period

	2012	2011	2010
Restricted stock units granted	652,120	617,195	511,418
Weighted average vesting period (years)	3.00	3.00	3.00

Schedule of Vesting Activity for Stock Units

Vesting activity for stock units during 2012 was as follows:

Restricted Stock Units	Number of Shares	Weighted Average Grant-Date Fair Value
Nonvested as of January 1, 2012	1,698,439	$	39.74
Nonvested as of December 31, 2012	1,628,744	$	41.10
Granted in 2012	652,120	$	44.58
Forfeited in 2012	141,499	$	40.39
Vested in 2012	663,954	$	43.93

Schedule of Stock Option Activity

Stock option activity during 2012 was as follows:

Stock Option Activity	Number of Shares		Weighted Average Exercise Price
Balance, January 1, 2012 (3,593,863 options exercisable)	4,255,985		$	38.17
Options exercised	(1,327,008	)	33.11
Options forfeited	(18,708	)	59.58
Balance, December 31, 2012 (2,348,469 options exercisable)	2,910,269		$	40.33

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, 2012, were as follows:

	Options Outstanding
Range of Exercise Prices	Shares	Weighted Average Exercise Price		Remaining Contractual Life
$20.02-$28.42	136,202	$	21.49	1.29
$28.43-$35.45	851,948	$	33.04	3.56
$35.46-$79.11	1,657,150	$	39.23	4.04
$79.12-$81.19	264,969	$	80.47	4.80
Total	2,910,269	$	40.33	3.84