Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

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

Components of share-based compensation expense, net of forfeitures [Table Text Block]

The components of the Company’s share-based compensation expense, net of forfeitures, were as follows:

	December 31,
	2017		2016		2015
	(in millions)
Stock option	$	32	$	34	$	39
Restricted stock	24		24		22
Restricted stock units	65		76		83
Liability awards	45		4		14
Total	$	166	$	138	$	158

Weighted average assumptions used for stock option grants [Table Text Block]

The following weighted average assumptions were used for stock option grants:

	2017		2016		2015
Dividend yield	2.3	%	2.3	%	2.0	%
Expected volatility	30	%	27	%	26	%
Risk-free interest rate	1.9	%	1.3	%	1.2	%
Expected life of stock option (years)	5.0		5.0		5.0

Summary of stock option activity [Table Text Block]

A summary of the Company’s stock option activity for 2017 is presented below (shares and intrinsic value in millions):

	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding at January 1	8.2		$	84.85	6.7	$	241
Granted	1.2		123.58
Exercised	(3.3	)	69.41
Forfeited	(0.1	)	106.62
Outstanding at December 31	6.0		100.38		7.0	413
Exercisable at December 31	3.2		92.72		5.8	243

Summary of restricted stock award activity [Table Text Block]

A summary of activity for the Company’s restricted stock awards, restricted stock units granted to employees (including advisors), compensation and commission deferrals into stock and deferred share units for 2017 is presented below (shares in millions):

	Shares		Weighted Average Grant-date Fair Value
Non-vested shares at January 1	1.3		$	99.37
Granted	0.5		127.08
Deferred	0.2		134.01
Vested	(0.7	)	113.59
Forfeited	(0.1	)	106.43
Non-vested shares at December 31	1.2		107.52