Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Stock Option Activity [Table Text Block]

Stock option activity for the year ended December 31, 2019 is summarized in the table below:

	Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life	Aggregate Intrinsic Value
	(in millions)				(in years)	(in millions)
Outstanding at beginning of period	35		$	131
Granted	7		260
Exercised	(9	)	94
Forfeited	(1	)	212
Outstanding at end of period	32		166		6.5	$	4,106
Exercisable at end of period	15		114		5.0	2,716
Vested and expected to vest, end of period	31		165		6.4	4,068

Restricted Share Activity [Table Text Block]

Restricted share activity for the year ended December 31, 2019 is summarized in the table below:

(shares in millions)	Shares		Weighted-Average Grant Date Fair Value per Share
Nonvested at beginning of period	6		$	163
Granted	2		259
Vested	(3	)	147
Nonvested at end of period	5		207

Other Share-Based Compensation Data [Table Text Block]

Other Share-Based Compensation Data

(in millions, except per share amounts)	For the Years Ended December 31,
	2019		2018		2017
Stock Options
Weighted-average grant date fair value of shares granted, per share	$	46	$	43	$	29
Total intrinsic value of stock options exercised	1,398		1,431		1,473
Restricted Shares
Weighted-average grant date fair value of shares granted, per share	259		229		163
Total fair value of restricted shares vested	$	545	$	521	$	460
Employee Stock Purchase Plan
Number of shares purchased	1		2		2
Share-Based Compensation Items
Share-based compensation expense, before tax	$	697	$	638	$	597
Share-based compensation expense, net of tax effects	641		587		531
Income tax benefit realized from share-based award exercises	201		239		431

(in millions, except years)	December 31, 2019
Unrecognized compensation expense related to share awards	$	714
Weighted-average years to recognize compensation expense	1.3

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The principal assumptions the Company used in calculating grant-date fair value for stock options were as follows:

	For the Years Ended December 31,
	2019	2018	2017
Risk-free interest rate	1.5% - 2.5%	2.6% - 3.1%	1.9% - 2.1%
Expected volatility	19.4% - 21.6%	18.7% - 19.3%	18.5% - 20.7%
Expected dividend yield	1.4% - 1.8%	1.3% - 1.5%	1.4% - 1.6%
Forfeiture rate	5.0%	5.0%	5.0%
Expected life in years	5.3	5.6	5.7