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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]  
Flexible Stock Plan Options
At December 31, 2019, the following common shares were authorized for issuance under the Plan:
 
 
Shares Available for Issuance
 
Maximum Number of Authorized Shares
Unexercised options
.6

 
.6

Outstanding stock units—vested
3.5

 
7.8

Outstanding stock units—unvested
1.1

 
3.3

Available for grant
5.0

 
5.0

Authorized for issuance at December 31, 2019
10.2

 
16.7
Components Of Stock-Based Compensation The following table recaps the impact of stock-based compensation on the results of operations for each of the periods presented:
 
Year Ended December 31
 
2019
 
2018
 
2017
 
To Be Settled With Stock
 
To Be Settled In Cash
 
To Be Settled With Stock
 
To Be Settled In Cash
 
To Be Settled With Stock
 
To Be Settled In Cash
Stock-based retirement plans contributions 2
$
3.7

 
$
.6

 
$
5.6

 
$
1.0

 
$
5.5

 
$
1.2

Discounts on various stock awards:
 
 
 
 
 
 
 
 
 
 
 
Deferred Stock Compensation Program 1
2.1

 
—

 
1.9

 
—

 
2.1

 
—

Stock-based retirement plans 2
1.3

 
—

 
1.3

 
—

 
1.4

 
—

Discount Stock Plan 6
1.0

 
—

 
1.1

 
—

 
1.1

 
—

Performance Stock Unit (PSU) awards: 3
 
 
 
 
 
 
 
 
 
 
 
     2018 and later PSU - TSR based 3A
2.8

 
4.1

 
1.2

 
.8

 
—

 
—

     2018 and later PSU - EBIT CAGR based 3B
3.8

 
5.3

 
2.9

 
2.5

 
—

 
—

     2017 and prior PSU awards 3C
1.8

 
1.0

 
3.6

 
(1.3
)
 
5.4

 
(1.4
)
Profitable Growth Incentive (PGI) awards 4
—

 
—

 
.9

 
.9

 
1.4

 
1.4

Restricted Stock Units (RSU) awards 5
2.0

 
—

 
2.1

 
—

 
2.5

 
—

Other, primarily non-employee directors restricted stock
1.4

 
—

 
.9

 
—

 
.9

 
—

Total stock-related compensation expense
19.9

 
$
11.0

 
21.5

 
$
3.9

 
20.3

 
$
1.2

Employee contributions for above stock plans
13.1

 
 
 
14.0

 
 
 
16.3

 
 
Total stock-based compensation
$
33.0

 
 
 
$
35.5

 
 
 
$
36.6

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Tax benefits on stock-based compensation expense
$
4.7

 
 
 
$
5.1

 
 
 
$
7.3

 
 
Tax benefits on stock-based compensation payments (As discussed below, we elected to pay selected awards in cash during 2018.)
5.6

 
 
 
3.9

 
 
 
9.9

 
 
Total tax benefits associated with stock-based compensation
$
10.3

 
 
 
$
9.0

 
 
 
$
17.2

 
 
Schedule of Stock-based Compensation Assets and Liabilities
The following table recaps the impact of stock-based compensation on assets and liabilities for each of the periods presented:
 
2019
 
2018
 
Current
 
Long-term
 
Total
 
Current
 
Long-term
 
Total
Assets:
 
 
 
 
 
 
 
 
 
 
 
Diversified investments associated with the Executive Stock Unit Program 2
$
2.8

 
$
38.2

 
$
41.0

 
$
2.3

 
$
30.4

 
$
32.7

 
 
 
 
 
 
 
 
 
 
 
 
Liabilities:
 
 
 
 
 
 
 
 
 
 
 
Executive Stock Unit Program 2
$
2.8

 
$
37.8

 
$
40.6

 
$
2.3

 
$
31.4

 
$
33.7

Performance Stock Unit (TSR) award 3A
1.5

 
5.0

 
6.5

 
.6

 
.7

 
1.3

Performance Stock Unit (EBIT) award 3B
4.1

 
3.7

 
7.8

 
—

 
2.5

 
2.5

Profitable Growth Incentive award 4
—

 
—

 
—

 
4.3

 
—

 
4.3

Other - primarily timing differences between employee withholdings and related employer contributions to be submitted to various plans' trust accounts
6.2

 
—

 
6.2

 
7.4

 
—

 
7.4

Total liabilities associated with stock-based compensation
$
14.6

 
$
46.5

 
$
61.1

 
$
14.6

 
$
34.6

 
$
49.2
Deferred Compensation Arrangement with Individual Disclosure, Postretirement Benefits
 
Options
 
Units
 
Cash
Aggregate amount of compensation deferred during 2019
$
.1

 
$
6.9

 
$
.6
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award
Stock option information for the plans discussed above is as follows:
 
Total Stock
Options
 
Weighted
Average
Exercise
Price per
Share
 
Weighted
Average
Remaining
Contractual
Life in Years
 
Aggregate
Intrinsic
Value
Outstanding at December 31, 2018
1.6

 
$
25.43

 
 
 
 
Granted
.1

 
36.25

 
 
 
 
Exercised
(1.1
)
 
22.40

 
 
 
 
Outstanding at December 31, 2019
.6

 
$
33.03

 
4.7
 
$
10.4

Vested or expected to vest
.6

 
$
33.03

 
4.7
 
$
10.4

Exercisable (vested) at December 31, 2019
.5

 
$
32.34

 
3.8
 
$
8.9
Schedule of Share-based Compensation, Stock Options, Activity
Additional information related to stock option activity for the periods presented is as follows:
 
Year Ended December 31
 
2019
 
2018
 
2017
Total intrinsic value of stock options exercised
$
23.6

 
$
8.8

 
$
11.7

Cash received from stock options exercised
9.3

 
4.8

 
2.6

Total fair value of stock options vested
.3

 
.8

 
1.2
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table summarizes fair values calculated (and assumptions utilized) using the Black-Scholes option pricing model.
 
 
Year Ended December 31
 
 
2019
 
2018
 
2017
Aggregate grant date fair value
 
$
.5

 
$ <.1
 
$ <.1
Weighted-average per share grant date fair value
 
5.36

 
6.47

 
9.21

Risk-free interest rate
 
2.8
%
 
2.3
%
 
2.3
%
Expected life in years
 
7.8

 
6.0

 
6.0

Expected volatility (over expected life)
 
22.3
%
 
19.4
%
 
19.8
%
Expected dividend yield (over expected life)
 
4.2
%
 
3.1
%
 
3.1
%
Schedule Of Share Based Compensation Arrangement By Share Based Payment Award Performance Based Units Table
Below is a summary of shares and grant date fair value related to PSU awards for the periods presented:
 
 
Year Ended December 31
 
2019
 
2018
 
2017
TSR based
 
 
 
 
 
Total shares base award
.1

 
.1

 
.1

Grant date per share fair value
$
57.86

 
$
42.60

 
$
50.75

Risk-free interest rate
2.4
%
 
2.4
%
 
1.5
%
Expected life in years
3.0

 
3.0

 
3.0

Expected volatility (over expected life)
21.5
%
 
19.9
%
 
19.5
%
Expected dividend yield (over expected life)
3.4
%
 
3.3
%
 
2.8
%
 
 
 
 
 
 
EBIT CAGR based
 
 
 
 
 
Total shares base award
.1

 
.1

 
 
Grant date per share fair value
$
39.98

 
$
40.92

 
 
Vesting period in years
3.0

 
3.0

 
 

Three-Year Performance Cycle
Award Year
 
Completion Date
 
TSR Performance
Relative to the  Peer Group (1%=Best)
 
Payout as a
Percent of the
Base Award
 
Number of Shares
Distributed
 
Cash Portion
 
Distribution Date
2015
 
December 31, 2017
 
57
 
61.0%
 
—
 
$
6.9

 
First quarter 2018
2016
 
December 31, 2018
 
78
 
—%
 
—
 
$
—

 
First quarter 2019
2017
 
December 31, 2019
 
63
 
49.0%
 
.1 million
 
$
1.6

 
First quarter 2020
Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Cycle For PGI Awards
Two-Year Performance Cycle
Award Year
 
Completion Date
 
Average Payout as a Percent of the Base Award
 
Estimated Number of Shares
 
Cash Portion
 
Expected Distribution Date
2015
 
December 31, 2016
 
36.0%
 
< .1 million
 
$
.8

 
First quarter 2017
2016
 
December 31, 2017
 
44.0%
 
—
 
$
2.0

 
First quarter 2018
2017
 
December 31, 2018
 
155.0%
 
< .1 million
 
$
2.2

 
First quarter 2019
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
Stock unit information for the plans discussed above is presented in the table below:
 
DSU
 
ESUP
 
PSU*
 
RSU
 
Total Units
 
Weighted
Average
Grant Date
Fair Value
per Unit
 
Aggregate
Intrinsic
Value
Unvested at December 31, 2018
—

 
—

 
.7

 
.1

 
.8

 
$
38.43

 
 
Granted based on current service
.2

 
.2

 
—

 
.1

 
.5

 
41.48

 
 
Granted based on future conditions
—

 
—

 
.4

 
—

 
.4

 
24.26

 
 
Vested
(.2
)
 
(.2
)
 
—

 
(.1
)
 
(.5
)
 
43.97

 
 
Forfeited
—

 
—

 
(.1
)
 
—

 
(.1
)
 
—

 
 
Unvested at December 31, 2019
—

 
—

 
1.0

 
.1

 
1.1

 
$
33.30

 
$
56.4

Fully vested shares available for issuance at December 31, 2019
 
 
 
 
 
 
 
 
3.5

 
 
 
$
176.2


*PSU awards are presented at maximum payout (2017 award at 175% and 2018 and later awards at 200%)
Stock Units Converted To Common Stock
 
Year Ended December 31
 
2019
 
2018
 
2017
Total intrinsic value of vested stock units converted to common stock
$
8.0

 
$
12.1

 
$
22.7
Discount Stock Plan
Average 2019 purchase price per share (net of discount)
$
35.62

2019 number of shares purchased by employees
.2

Shares purchased since inception in 1982
23.3

Maximum shares under the plan
27.0