Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Share-based Compensation [Abstract]

Schedule of Stock Options Activity

A summary of the Company's share option activity and related information for the year ended December 31, 2018 follows:

	Options (000s)		Weighted Average Exercise Price
Outstanding January 1, 2018	1,581		$	34.97
Exercised	(151	)	32.83
Outstanding December 31, 2018	1,430		$	35.20
Exercisable at December 31, 2018	1,430		$	35.20

Schedule of Key Assumptions Used in the Monte Carlo Simulation

The key assumptions used in the Monte Carlo simulations are as follows:

	Year Ended December 31,
	2018	2017	2016
Risk-free interest rate	2.39%	1.43%	1.01%
Volatility	19%	20%	19%

Schedule of Nonvested Share Activity

The Company's restricted LTI share activity for the year ended December 31, 2018 is as follows:

	Shares (000s)		Weighted Avg. Grant Date Fair value
Nonvested at January 1, 2018	775		$	36.43
Granted	343		39.89
Vested	(292	)	36.29
Forfeited	(44	)	37.85
Nonvested at December 31, 2018	782		$	37.92