Stock Compensation (Tables)

6 Months Ended

Jun. 30, 2018

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)	June 30, 2018		July 1, 2017		June 30, 2018		July 1, 2017
Pre-tax compensation expense	$	16	$	21	$	33	$	39
Related income tax benefit	$	4	$	8	$	8	$	14

Summary of Stock Option Activity

Year-to-date period ended June 30, 2018:

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	14		$	64
Granted	3		70
Exercised	(1	)	57
Forfeitures and expirations	(1	)	70
Outstanding, end of period	15		$	65	6.6	$	92
Exercisable, end of period	11		$	63	5.7	$	91

Year-to-date period ended July 1, 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	—		—
Outstanding, end of period	16		$	64	7.0	$	109
Exercisable, end of period	11		$	60	6.1	$	104

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 June 30, 2018:	18	%	6.6	2.82	%	3.00	%
Grants within the year-to-date period ended July 1, 2017:	18	%	6.6	2.26	%	2.80	%

Maximum Future Value of Performance Shares

(millions)	June 30, 2018
2016 Award	$	18
2017 Award	$	16
2018 Award	$	26

Schedule of Restricted Stock Activity

Year-to-date period ended June 30, 2018:

Employee restricted stock units	Shares (thousands)		Weighted-average grant-date fair value
Non-vested, beginning of year	1,673		$	65
Granted	697		63
Vested	(416	)	59
Forfeited	(151	)	63
Non-vested, end of period	1,803		$	66

Year-to-date period ended July 1, 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	654		67
Vested	(35	)	57
Forfeited	(72	)	65
Non-vested, end of period	1,713		$	65