Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Fair Value of Each Stock Option Award is Estimated on Grant Date, Using Option Valuation Models

expected share-based award life on the date of grant. The expected life is an estimate of the number of years a share-based award will be held before it is exercised. The expected dividend yield is estimated based on the assumption that the dividend yield at date of grant will be maintained over the expected life of the grant.

	2018			2017			2016
Risk-free interest rate		2.62	%		2.13	%		1.70	%
Expected volatility		29	%		31	%		36	%
Expected life, in years		6.15			6.17			6.25
Expected dividend yield		1.37	%		—			—

Schedule of Stock Option Activity

Information regarding Time Stock Options and SARs and Performance Stock Options and SARs activity during 2018, 2017 and 2016 is summarized below (share amounts in thousands):

	Time Stock Options and SARs			Performance Stock Options and SARs			Total Stock Options and SARs			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value (dollars in millions)
Options and SARs outstanding, December 31, 2015		12,165			10,427			22,592		$	27.73
Granted		1,601			—			1,601			69.96
Exercised		(2,521	)		(4,171	)		(6,692	)		15.85
Cancelled		(309	)		(126	)		(435	)		55.17
Options and SARs outstanding, December 31, 2016		10,936			6,130			17,066			35.65
Granted		1,879			—			1,879			81.83
Exercised		(1,549	)		(1,366	)		(2,915	)		21.49
Cancelled		(110	)		(178	)		(288	)		52.92
Options and SARs outstanding, December 31, 2017		11,156			4,586			15,742			43.47
Granted		2,342			—			2,342			101.96
Exercised		(3,917	)		(1,774	)		(5,691	)		27.86
Cancelled		(221	)		(145	)		(366	)		68.43
Options and SARs outstanding, December 31, 2018		9,360			2,667			12,027		$	61.49		6.1 years	$	758
Options and SARs exercisable, December 31, 2018		4,720			2,667			7,387		$	44.17		4.7 years	$	593

Schedule of Restricted Stock Units Activity

Information regarding Time RSUs, Performance RSUs and PSUs activity during 2018, 2017 and 2016 is summarized below (share amounts in thousands):

	Time RSUs			Performance RSUs			PSUs			Total RSUs and PSUs			Weighted Average Grant Date Fair Value
RSUs and PSUs outstanding, December 31, 2015		5,302			1,740			1,371			8,413		$	51.15
Granted		1,450			—			1,178			2,628			69.95
Vested		(2,242	)		(870	)		—			(3,112	)		41.71
Cancelled		(399	)		(80	)		(163	)		(642	)		59.66
RSUs and PSUs outstanding, December 31, 2016		4,111			790			2,386			7,287			61.21
Granted		1,484			—			1,304			2,788			81.90
Vested		(1,824	)		(430	)		—			(2,254	)		51.20
Cancelled		(306	)		(133	)		(128	)		(567	)		64.06
RSUs and PSUs outstanding, December 31, 2017		3,465			227			3,562			7,254			72.05
Granted		1,464			—			1,261			2,725			101.85
Performance adjustment		—			—			1,250			1,250			69.27
Vested		(1,487	)		(136	)		(2,500	)		(4,123	)		67.33
Cancelled		(319	)		(91	)		(151	)		(561	)		78.82
RSUs and PSUs outstanding, December 31, 2018		3,123			—			3,422			6,545		$	86.32