Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2013

Equity Incentive Plans

Assumptions used to determine the fair value of options granted

	2013		2012		2011
Weighted average expected term		8.2 years		9.0 years		7.9 years
Expected volatility		19.1 - 48.1%		20.2 - 53.9%		22.1 - 53.9%
Weighted average volatility		31.0%		34.6%		35.1%
Expected dividends		1.9 - 2.2%		2.2 - 3.0%		2.5 - 3.7%
Weighted average expected dividends		2.2%		2.8%		2.7%
Risk-free rate		0.0 - 2.9%		0.0 - 2.2%		0.0 - 3.5%

Summary of option activity

	Number (in 000s)			Weighted average exercise price		Aggregate intrinsic value (in 000s)		Weighted average remaining contractual term (years)
Outstanding as of January 1, 2013		29,643		$	39.81
Granted		2,809			45.68
Exercised		(6,062	)		34.93
Forfeited		(556	)		35.77
Expired		(1,852	)		55.72
Outstanding as of December 31, 2013		23,982			40.60	$	350,860		5.1
Outstanding, net of expected forfeitures		23,773			40.61		347,686		5.1
Outstanding, exercisable ("vested")		15,545			43.09		194,376		3.7

Changes in restricted stock units

	Number (in 000s)			Weighted average grant date fair value
Nonvested as of January 1, 2013		4,452		$	27.27
Granted		817			45.78
Vested		(2,260	)		22.49
Forfeited		(169	)		35.77
Nonvested as of December 31, 2013		2,840			35.89

Changes in performance stock units

	Number (in 000s)			Weighted average grant date fair value
Nonvested as of January 1, 2013		437		$	31.43
Granted		312			45.61
Adjustment for performance achievement		132			31.17
Vested		—			—
Forfeited		(38	)		37.22
Nonvested as of December 31, 2013		843			36.38