Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

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

The expected life is an estimate of the number of years a share-based award will be held before it is exercised.

	2016			2015			2014
Risk-free interest rate		1.70	%		1.59	%		1.96	%
Expected volatility		36	%		36	%		37	%
Expected life, in years		6.25			6.25			6.25
Expected dividend yield		—			—			—

Schedule of Stock Option Activity

Information regarding Time Stock Options and SARs and Performance Stock Options and SARs activity during 2016, 2015 and 2014 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, 2013		16,809			18,377			35,186		$	15.82
Granted		1,723			1,722			3,445			48.56
Exercised		(3,322	)		(5,234	)		(8,556	)		9.15
Cancelled		(159	)		(121	)		(280	)		29.54
Options and SARs outstanding, December 31, 2014		15,051			14,744			29,795			21.39
Granted		1,746			—			1,746			69.16
Exercised		(4,093	)		(3,988	)		(8,081	)		12.77
Cancelled		(539	)		(329	)		(868	)		32.59
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		5.5 years	$	655
Options and SARs exercisable, December 31, 2016		7,015			4,943			11,958		$	26.15		4.5 years	$	573

Schedule of Restricted Stock Units Activity

Information regarding Time RSUs, Performance RSUs and PSUs activity during 2016, 2015 and 2014 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, 2013		5,099			2,399			—			7,498		$	33.30
Granted		2,603			1,229			—			3,832			48.53
Vested		(1,423	)		(692	)		—			(2,115	)		32.56
Cancelled		(384	)		(155	)		—			(539	)		38.30
RSUs and PSUs outstanding, December 31, 2014		5,895			2,781			—			8,676			39.89
Granted		1,694			—			1,411			3,105			69.43
Vested		(1,953	)		(928	)		—			(2,881	)		37.61
Cancelled		(334	)		(113	)		(40	)		(487	)		47.26
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