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Stock Compensation (Tables)
12 Months Ended
Dec. 29, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule Of Compensation Expense For Equity Programs And Related Tax Benefits Text Block [Table Text Block]
(millions)
 
2018
 
2017
 
2016
Pre-tax compensation expense
 
$
64

 
$
71

 
$
68

Related income tax benefit
 
$
16

 
$
26

 
$
25

Schedule of Cash and Tax Benefits Received Upon Exercise of Stock Options and Similar Instruments [Table Text Block]
(millions)
 
2018
 
2017
 
2016
Total cash received from option exercises and similar instruments
 
$
167

 
$
97

 
$
368

Tax benefits realized upon exercise or vesting of stock-based awards:
 
 
 
 
 
 
Windfall benefits classified as cash flow from operating activities
 
$
11

 
$
4

 
$
36

Schedule of Stock Option Valuation Model Assumptions for Grants [Table Text Block]
Stock option valuation model
assumptions for grants within the
year ended:
 
2018
 
2017
 
2016
Weighted-average expected volatility
 
18.00
%
 
18.00
%
 
17.00
%
Weighted-average expected term (years)
 
6.60

 
6.60

 
6.88

Weighted-average risk-free interest rate
 
2.82
%
 
2.26
%
 
1.60
%
Dividend yield
 
3.00
%
 
2.80
%
 
2.60
%
Weighted-average fair value of options granted
 
$
10.00

 
$
10.14

 
$
9.44

Share-based Compensation, Activity [Table Text Block]
Employee and
director stock
options
 
Shares
(millions)
 
Weighted-
average
exercise
price
 
Weighted-
average
remaining
contractual
term (yrs.)
 
Aggregate
intrinsic
value
(millions)
Outstanding, beginning of year
 
14

 
$
64

 
 
 
 
Granted
 
3

 
70

 
 
 
 
Exercised
 
(2
)
 
58

 
 
 
 
Forfeitures and expirations
 
(1
)
 
71

 
 
 
 
Outstanding, end of year
 
14

 
$
66

 
6.3
 
$
7

Exercisable, end of year
 
10

 
$
63

 
5.3
 
$
7

Additionally, option activity for the comparable prior year periods is presented in the following table:
(millions, except per share data)
 
2017
 
2016
Outstanding, beginning of year
 
15

 
19

Granted
 
2

 
3

Exercised
 
(2
)
 
(6
)
Forfeitures and expirations
 
(1
)
 
(1
)
Outstanding, end of year
 
14

 
15

Exercisable, end of year
 
10

 
8

Weighted-average exercise price:
 
 
 
 
Outstanding, beginning of year
 
$
62

 
$
58

Granted
 
73

 
76

Exercised
 
57

 
56

Forfeitures and expirations
 
70

 
67

Outstanding, end of year
 
$
64

 
$
62

Exercisable, end of year
 
$
60

 
$
58

Summary of Restricted Stock Summary [Table Text Block]
Employee restricted stock and restricted
stock units
 
Shares
(thousands)
 
Weighted-
average
grant-date
fair value
Non-vested, beginning of year
 
1,673

 
$
65

Granted
 
772

 
63

Vested
 
(507
)
 
59

Forfeited
 
(230
)
 
64

Non-vested, end of year
 
1,708

 
$
65

Additionally, restricted stock and restricted stock unit activity for 2017 and 2016 is presented in the following table:
Employee restricted stock and restricted stock units
 
2017
 
2016
Shares (in thousands):
 
 
 
 
Non-vested, beginning of year
 
1,166

 
806

Granted
 
776

 
601

Vested
 
(109
)
 
(116
)
Forfeited
 
(160
)
 
(125
)
Non-vested, end of year
 
1,673

 
1,166

Weighted-average exercise price:
 
 
 
 
Non-vested, beginning of year
 
$
63

 
$
57

Granted
 
65

 
70

Vested
 
58

 
56

Forfeited
 
65

 
63

Non-vested, end of year
 
$
65

 
$
63