Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Share-based Compensation [Abstract]

Summary of Information Concerning Stock Options Outstanding Including the Related Transactions under the Stock Option Plans

				Weighted-
				Average
		Weighted-		Remaining	Aggregate
	Number	Average		Contractual	Intrinsic
	of Shares	Exercise		Term in	Value
	(in thousands)	Price		Years	(in thousands)
Options Outstanding as of December 31, 2016	31,507	$	19.40
Granted	1,501		27.00
Exercised	(8,429)		21.78
Forfeited and Expired	(80)		21.40
Options Outstanding as of March 31, 2017	24,499		19.04	4.64	$	195,009
Options Expected to Vest as of March 31, 2017	24,949		19.07	4.68		197,946
Options Exercisable as of March 31, 2017	18,769		18.01	3.41		168,779

Inputs Used for Valuation of Option Grants under Stock Option Plans

	Three months ended
	March 31,
	2017	2016
Expected volatility	36.1%	43.1%
Weighted-average volatility	36.1%	43.1%
Expected dividends	2.28%	2.94%
Risk-free rate	2.3%	1.5%
Average risk-free rate	2.3%	1.5%
Expected term (in years)	7.4	7.4
Pre-vesting departure rate	0.6%	0.6%

Summary of the Status of Non-vested Time-based Restricted Stock and Restricted Stock Units

		Weighted
		Average
	Shares	Grant-Date
	(000’s)	Fair Value
Non-vested shares and share units at December 31, 2016	4,640	$	20.15
Granted	956		26.90
Vested	(150)		20.16
Forfeited	(53)		20.99
Non-vested shares and share units at March 31, 2017	5,393	$	21.34