Stock Compensation (Tables)

9 Months Ended

Sep. 30, 2017

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

Schedule of Compensation Expense for Equity-Based Programs and Related Income Tax Benefits

	Quarter ended				Year-to-date period ended
(millions)	September 30, 2017		October 1, 2016		September 30, 2017		October 1, 2016
Pre-tax compensation expense	$	18	$	16	$	57	$	49
Related income tax benefit	$	7	$	6	$	21	$	18

Summary of Stock Option Activity

Year-to-date period ended September 30, 2017:

Employee and director stock options	Shares (millions)		Weighted- average exercise price		Weighted- average remaining contractual term (yrs.)	Aggregate intrinsic value (millions)
Outstanding, beginning of period	15		$	62
Granted	2		73
Exercised	(1	)	57
Forfeitures and expirations	(1	)	70
Outstanding, end of period	15		$	64	6.8	$	37
Exercisable, end of period	10		$	60	5.8	$	37

Year-to-date period ended October 1, 2016:

Employee and director stock options	Shares (millions)		Weighted- average exercise price		Weighted- average remaining contractual term (yrs.)	Aggregate intrinsic value (millions)
Outstanding, beginning of period	19		$	58
Granted	3		76
Exercised	(6	)	56
Forfeitures and expirations	(1	)	67
Outstanding, end of period	15		$	62	7.2	$	226
Exercisable, end of period	8		$	58	6.1	$	168

Schedule of Fair Value Assumptions

	Weighted- average expected volatility		Weighted- average expected term (years)	Weighted- average risk-free interest rate		Dividend yield
Grants within the year-to-date period ended September 30, 2017:	18	%	6.6	2.26	%	2.80	%
Grants within the year-to-date period ended October 1, 2016:	17	%	6.9	1.60	%	2.60	%

Maximum Future Value of Performance Shares

(millions)	September 30, 2017
2015 Award	$	20
2016 Award	$	22
2017 Award	$	23

Schedule of Restricted Stock Activity

Year-to-date period ended September 30, 2017:

Employee restricted stock and restricted stock units	Shares (thousands)		Weighted-average grant-date fair value
Non-vested, beginning of year	1,166		$	63
Granted	666		67
Vested	(76	)	57
Forfeited	(125	)	65
Non-vested, end of period	1,631		$	65

Year-to-date period ended October 1, 2016:

Employee restricted stock and restricted stock units	Shares (thousands)		Weighted-average grant-date fair value
Non-vested, beginning of year	806		$	58
Granted	589		70
Vested	(68	)	56
Forfeited	(85	)	62
Non-vested, end of period	1,242		$	63