Stock Plans (Tables)

3 Months Ended

Mar. 31, 2018

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock option activity is reflected below:



	Shares Subject to Option		Weighted- Average Exercise or Grant Price Per Share	Average Remaining Contractual Term	Aggregate Intrinsic Value
Balance at January 1, 2018	48,434,655		$29.92	5 years	$	626	million
Annual grant to eligible employees	5,666,530		43.51
Additional options issued	10,820		43.92
Total options granted	5,677,350		43.51
Options exercised ⁽¹⁾	(3,520,671	)	24.92		$	68	million
Options canceled	(282,433	)	35.81
Balance at March 31, 2018	50,308,901		31.77	6 years	$	520	million


(1)	Cash received from options exercised was $85 million in the three months ended March 31, 2018. The actual tax benefit realized and recorded in the provision for income taxes for the tax deductions from the option exercises totaled $8 million in the three months ended March 31, 2018.

Deferred Stock Units, Performance Units and Restricted Stock

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Performance Share Units and Stock-Based Awards Activity

Our performance share unit, deferred stock unit and historically granted restricted stock activity is reflected below:



	Number of Shares		Grant Date	Weighted-Average Fair Value Per Share ⁽³⁾	Weighted-Average Aggregate Fair Value ⁽³⁾
Balance at January 1, 2018	7,669,705			$39.74
Annual grant to eligible employees:			Feb 22, 2018
Performance share units	1,048,770			51.23
Deferred stock units	788,310			43.51
Additional shares granted ⁽¹⁾	103,743		Various	39.48
Total shares granted	1,940,823			47.47	$	92	million
Vested ⁽²⁾	(2,084,527	)		38.28	$	80	million
Forfeited ⁽²⁾	(195,028	)		38.80
Balance at March 31, 2018	7,330,973			42.23


(1)	Includes performance share units and deferred stock units.


(2)	Includes performance share units, deferred stock units and historically granted restricted stock. The actual tax benefit realized and recorded in the provision for income taxes for the tax deductions from the shares vested totaled $4 million in the three months ended March 31, 2018.

(3)

The grant date fair value of performance share units is determined based on the Monte Carlo simulation model for the market-based total shareholder return component and the closing market price of the Company’s stock on the grant date for performance-based components. The Monte Carlo simulation model incorporates the probability of achieving the total shareholder return market condition. Compensation expense is recognized using the grant date fair values regardless of whether the market condition is achieved, so long as the requisite service has been provided.