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Stock-based Compensation and Other Stock Plans (Tables)
 12 Months Ended
Dec. 29, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Weighted-Average Assumptions of Fair Value Granted Using Black-Scholes Valuation Model, Stock Options
The following weighted-average assumptions were used in calculating the fair value of stock options granted during 2018, 2017 and 2016, using the Black-Scholes valuation model: 
 
 
2018
 
2017
 
2016
Expected term of option (in years)
 
5.35

 
5.15

 
5.05

Expected volatility factor
 
20.08
%
 
22.01
%
 
22.17
%
Expected dividend yield
 
1.68
%
 
1.63
%
 
1.77
%
Risk-free interest rate
 
2.71
%
 
1.78
%
 
1.04
%
Summary of Stock Option Activity
A summary of stock option activity during 2018 is presented below: 
 
 
Shares (in thousands)     
 
Exercise
 Price per 
Share*
 
Remaining Contractual   
Term*
(in years)
 
Aggregate
Intrinsic
Value
(in millions)
Outstanding at beginning of year
 
3,198

 
$
115.30

 
 
 
 
Granted
 
515

 
161.18

 
 
 
 
Exercised
 
(537
)
 
84.00

 
 
 
 
Forfeited or expired
 
(46
)
 
159.33

 
 
 
 
Outstanding at end of year
 
3,130

 
127.57

 
6.3
 
$
75.3

Exercisable at end of year
 
2,047

 
110.48

 
5.1
 
74.1
Summary of Changes in Non-Vested Performance Awards
Changes to the company’s non-vested performance awards in 2018 are as follows:
 
 
Shares
(in thousands)
 
Fair Value
Price per
Share*
Non-vested performance awards at beginning of year
 
132

 
$
149.93

Granted
 
87

 
161.18

Vested
 
(74
)
 
138.11

Cancellations and other
 
(25
)
 
156.63

Non-vested performance awards at end of year
 
120

 
164.00

* Weighted-average
 
 
 
 
Summary of Weighted-Average Assumptions of Fair Value Granted Using Black-Scholes Valuation Model, SAR's
The following weighted-average assumptions were used in calculating the fair value of stock-settled SARs granted during 2018, 2017 and 2016, using the Black-Scholes valuation model:
 
 
2018
 
2017
 
2016
Expected term of stock-settled SARs (in years)
 
3.58

 
3.99

 
4.03

Expected volatility factor
 
20.08
%
 
19.39
%
 
20.09
%
Expected dividend yield
 
1.63
%
 
1.46
%
 
1.66
%
Risk-free interest rate
 
2.40
%
 
1.55
%
 
1.11
%
The following weighted-average assumptions were used in calculating the fair value of cash-settled SARs granted during 2018, 2017 and 2016, using the Black-Scholes valuation model:
 
 
2018
 
2017
 
2016
Expected term of cash-settled SARs (in years)
 
2.76

 
3.09

 
3.11

Expected volatility factor
 
21.96
%
 
19.93
%
 
19.53
%
Expected dividend yield
 
1.75
%
 
1.59
%
 
1.56
%
Risk-free interest rate
 
2.50
%
 
1.98
%
 
1.47
%
Summary of Changes in SARs
Changes to the company’s non-vested cash-settled SARs in 2018 are as follows:
 
 
Cash-settled
SARs     (in thousands)     
 
Fair Value
 Price per 
Share*
Non-vested cash-settled SARs at beginning of year
 
5
 
$
35.41

Granted
 
1
 
14.98

Vested
 
(3)
 
15.61

Non-vested cash-settled SARs at end of year
 
3
 
14.89

* Weighted-average
 
 
 
 
Changes to the company’s stock-settled SARs in 2018 are as follows:
 
 
Stock-settled
SARs (in thousands)     
 
Exercise
 Price per 
Share*
 
Remaining Contractual   
Term*
(in years)
 
Aggregate
Intrinsic
Value
(in millions)
Outstanding at beginning of year
 
360
 
$
138.63

 
 
 
 
Granted
 
89
 
161.18

 
 
 
 
Exercised
 
(24)
 
105.55

 
 
 
 
Forfeited or expired
 
(53)
 
129.40

 
 
 
 
Outstanding at end of year
 
372
 
147.41

 
7.4
 
$
2.6

Exercisable at end of year
 
191
 
135.42

 
6.3
 
2.4

* Weighted-average