Share-Based Compensation (Stock Options and Restricted Stock Units) (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule of recognized share-based compensation expense

The tables below provide information on our share-based compensation.

Recognized Share-Based Compensation Expense
Year ended December 31 (in millions)	2019		2018		2017
Restricted share units	$	564	$	402	$	349
Stock options	231		205		205
Employee stock purchase plans	30		32		32
Total	$	825	$	639	$	586

Schedule of stock option and restricted share units activity

Stock Options and Restricted Share Units
As of December 31, 2019, unless otherwise stated (in millions, except per share data)	Stock Options		RSUs
Awards granted during 2019	42		17
Weighted-average exercise price of awards granted during 2019	$	40.50
Stock options outstanding and nonvested RSUs	192		51
Weighted-average exercise price of stock options outstanding	$	31.84
Weighted-average fair value at grant date of nonvested RSUs			$	36.54

Schedule of stock option and restricted share units fair value and significant assumptions

The table below presents the weighted-average fair value on the date of grant of RSUs and stock options awarded under our various plans and the related weighted-average valuation assumptions.

Year ended December 31	2019			2018			2017
RSUs fair value	$	40.42		$	35.56		$	37.77
Stock options fair value	$	7.91		$	7.14		$	7.01
Stock Option Valuation Assumptions:
Dividend yield	2.1		%	2.1		%	1.7		%
Expected volatility	22.0		%	22.0		%	20.1		%
Risk-free interest rate	2.5		%	2.7		%	2.2		%
Expected option life (in years)	6.0			6.0			6.1