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Stock Compensation (Tables)
 12 Months Ended
Dec. 30, 2017
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)
 
2017
 
2016
 
2015
Pre-tax compensation expense
 
$
71

 
$
68

 
$
55

Related income tax benefit
 
$
26

 
$
25

 
$
20
Schedule of Cash and Tax Benefits Received Upon Exercise of Stock Options and Similar Instruments [Table Text Block]
(millions)
 
2017
 
2016
 
2015
Total cash received from option exercises and similar instruments
 
$
97

 
$
368

 
$
261

Tax benefits realized upon exercise or vesting of stock-based awards:
 
 
 
 
 
 
Windfall benefits classified as cash flow from operating activities
 
$
4

 
$
36

 
NA

Windfall benefits classified as cash flow from financing activities
 
NA

 
NA

 
$
14
Schedule of Stock Option Valuation Model Assumptions for Grants [Table Text Block]
Stock option valuation model
assumptions for grants within the
year ended:
 
2017
 
2016
 
2015
Weighted-average expected volatility
 
18.00
%
 
17.00
%
 
16.00
%
Weighted-average expected term (years)
 
6.60

 
6.88

 
6.87

Weighted-average risk-free interest rate
 
2.26
%
 
1.60
%
 
1.98
%
Dividend yield
 
2.80
%
 
2.60
%
 
3.00
%
Weighted-average fair value of options granted
 
$
10.14

 
$
9.44

 
$
7.21
Schedule of 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
 
15

 
$
62

 
 
 
 
Granted
 
2

 
73

 
 
 
 
Exercised
 
(2
)
 
57

 
 
 
 
Forfeitures and expirations
 
(1
)
 
70

 
 
 
 
Outstanding, end of year
 
14

 
$
64

 
6.5
 
$
36

Exercisable, end of year
 
10

 
$
60

 
5.6
 
$
36

Additionally, option activity for the comparable prior year periods is presented in the following table:
(millions, except per share data)
 
2016
 
2015
Outstanding, beginning of year
 
19

 
21

Granted
 
3

 
3

Exercised
 
(6
)
 
(5
)
Forfeitures and expirations
 
(1
)
 
—

Outstanding, end of year
 
15

 
19

Exercisable, end of year
 
8

 
10

Weighted-average exercise price:
 
 
 
 
Outstanding, beginning of year
 
$
58

 
$
56

Granted
 
76

 
64

Exercised
 
56

 
53

Forfeitures and expirations
 
67

 
60

Outstanding, end of year
 
$
62

 
$
58

Exercisable, end of year
 
$
58

 
$
55
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
 
1,166

 
$
63

Granted
 
776

 
65

Vested
 
(109
)
 
58

Forfeited
 
(160
)
 
65

Non-vested, end of year
 
1,673

 
$
65

Additionally, restricted stock and restricted stock unit activity for 2016 and 2015 is presented in the following table:
Employee restricted stock and restricted stock units
 
2016
 
2015
Shares (in thousands):
 
 
 
 
Non-vested, beginning of year
 
806

 
346

Granted
 
601

 
617

Vested
 
(116
)
 
(113
)
Forfeited
 
(125
)
 
(44
)
Non-vested, end of year
 
1,166

 
806

Weighted-average exercise price:
 
 
 
 
Non-vested, beginning of year
 
$
57

 
$
54

Granted
 
70

 
59

Vested
 
56

 
50

Forfeited
 
63

 
58

Non-vested, end of year
 
$
63

 
$
57