Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Share-Based Compensation

Schedule of valuation assumptions for stock options

	For the Three Months Ended
	March 31,
	2017		2016
Expected life (in years)	5.5		5.5
Risk-free interest rate	1.93	%	1.36	%
Expected volatility	22.50	%	23.40	%
Expected dividend yield	1.68	%	1.80	%

Schedule of stock option activity

		Weighted
	Number of	Average		Average	Aggregate
	Options	Exercise		Remaining	Intrinsic
	(in	Price per		Contractual	Value
	thousands)	Share		Term (Years)	(in millions)
Outstanding at December 31, 2016	2,281	$	61.39	5.93	$	145
Granted	278		119.08
Exercised	(79)		37.38
Cancelled	(16)		80.47
Outstanding at March 31, 2017	2,464	$	68.53	6.26	$	128
Exercisable at March 31, 2017	1,880	$	56.86	6.20		120

Schedule of additional information pertaining to stock option activity

	Three Months Ended
	March 31,
(dollars in thousands, except per share)	2017		2016
Weighted average grant date fair value of stock options granted (per share)	$	23.90	$	18.73
Total intrinsic value of stock options exercised	$	6,849	$	12,665

Schedule of restricted unit activity

		Weighted
		Average
	Number of	Fair Value
(RSUs in thousands)	RSUs	per Share
Non-vested at December 31, 2016	429	$	81.04
Granted	112		119.13
Vested	(124)		62.18
Cancelled	(5)		87.96
Non-vested at March 31, 2017	412	$	98.13

Schedule of components of share based compensation expense

	Three Months Ended
	March 31,
(in millions)	2017		2016
Stock options:
Pre-tax compensation  expense	$	2	$	2
Income tax (benefit)		(1)		(1)
Stock option expense, net of income taxes		1		1
RSUs:
Pre-tax compensation  expense		3		3
Income tax (benefit)		(1)		(1)
RSUs, net of income taxes		2		2
Performance shares and other share-based awards:
Pre-tax compensation  expense		2		2
Income tax (benefit)		(1)		(1)
Performance shares and other share-based compensation expense, net of income taxes		1		1
Total share-based  compensation:
Pre-tax compensation  expense		7		7
Income tax (benefit)		(3)		(3)
Total share-based compensation  expense, net of income taxes	$	4	$	4