Stock-Based Incentive Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2017

Stock-Based Incentive Compensation Plans [Abstract]

Compensation Expense By Award Type

	For the Years Ended December 31,
	2017		2016		2015
Stock options	$	10	$	9	$	7
Performance shares		13		11		12
SARs		2		3		-
RSUs		25		23		22
Total	$	50	$	46	$	41
Recognized tax benefit	$	18	$	16	$	14

Total unrecognized compensation expense for all stock-based incentive compensation plans

	For the Years Ended December 31,
	2017			2016			2015
			Weighted-			Weighted-			Weighted-
			Average			Average			Average
	Expense		Period	Expense		Period	Expense		Period
Stock options	$	9	1.4	$	8	1.4	$	8	1.4
Performance shares		12	1.2		12	1.4		11	1.0
SARs		2	3.2		2	3.6		1	3.0
RSUs		32	1.1		25	1.2		24	1.0
Total unrecognized stock-based
incentive compensation expense	$	55		$	47		$	44

Option price assumptions used for stock option incentive plans

	For the Years Ended December 31,
	2017		2016		2015
Weighted-average fair value per option granted	$	18.27	$	9.32	$	13.00
Assumptions:
Dividend yield		2.0%		2.8%		1.9%
Expected volatility		31.5%		35.9%		28.0%
Risk-free interest rate		1.7-2.1%		1.0-1.6%		1.4-1.7%
Expected life (in years)		5.5		5.7		5.5

Summary of activity for stock options with performance conditions

						Weighted-
			Weighted-			Average
			Average		Remaining		Aggregate
			Exercise		Contractual		Intrinsic
	Shares		Price			Term	Value
Outstanding as of December 31, 2016	779,816		$	49.83
Granted – original	102,728			69.01
Exercised (includes shares tendered)	(596,374	)		51.13
Forfeited or expired	(14,446	)		47.44
Outstanding as of December 31, 2017	271,724		$	54.37		2.69	$	6
Vested or expected to vest as of December 31, 2017 (1)	236,907		$	53.68		2.58	$	5
Exercisable as of December 31, 2017	202,090		$	52.75		2.43	$	5

⁽¹⁾ Includes estimated forfeitures.

Summary of activity for stock options with service conditions

						Weighted-
			Weighted-			Average
			Average		Remaining		Aggregate
			Exercise		Contractual		Intrinsic
	Shares		Price			Term	Value
Outstanding as of December 31, 2016	2,713,058		$	41.97
Granted – original	407,637			71.47
Exercised (includes shares tendered)	(840,733	)		44.64
Forfeited or expired	(87,823	)		52.09
Outstanding as of December 31, 2017	2,192,139		$	46.02		7.07	$	68
Vested or expected to vest as of December 31, 2017 (1)	1,965,675		$	45.20		6.93	$	62
Exercisable as of December 31, 2017	1,214,214		$	40.22		5.97	$	45

⁽¹⁾ Includes estimated forfeitures.

Summary of activity for performance shares

				Weighted-
				Average
			Grant-Date
	Shares			Fair Value
Nonvested as of December 31, 2016	577,935			$	50.23
Granted	154,351				79.30
Vested	(155,541	)			54.68
Forfeited	(19,796	)			41.61
Nonvested as of December 31, 2017	556,949			$	53.65

Option price assumptions used for stock appreciation rights plan

	For the Years Ended December 31,
	2017		2016		2015
Weighted-average fair value per SAR granted	$	20.06	$	10.25	$	14.22
Assumptions:
Dividend yield		1.5%		2.9%		1.6%
Expected volatility		34.4%		35.8%		29.8%
Risk-free interest rate		2.2%		1.4%		1.8%
Expected life (in years)		5.0		5.0		5.0

Summary of activity for stock appreciation rights plan

						Weighted-
			Weighted-			Average
			Average		Remaining		Aggregate
			Exercise		Contractual		Intrinsic
	Shares		Price			Term	Value
Outstanding as of December 31, 2016	237,272		$	42.59
Granted – original	26,494			69.01
Exercised (includes shares tendered)	(93,159	)		37.02
Forfeited or expired	(8,419	)		40.40
Outstanding as of December 31, 2017	162,188		$	50.22		2.50	$	4
Vested or expected to vest as of December 31, 2017 (1)	155,300		$	50.18		2.45	$	4
Exercisable as of December 31, 2017	92,092		$	48.72		1.88	$	3

⁽¹⁾ Includes estimated forfeitures.

Summary of activity for restricted stock units

				Weighted-
				Average
			Grant-Date
	Shares			Fair Value
Outstanding as of December 31, 2016	1,508,367			$	45.61
Granted	448,527				71.26
Vested	(400,886	)			51.01
Forfeited	(61,276	)			46.34
Outstanding as of December 31, 2017	1,494,732			$	51.83