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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Flexible Stock Plan Options
At December 31, 2021, the following common shares were authorized for issuance under the Plan:
 
 Shares Available for Issuance Maximum Number of Authorized Shares
Unexercised options.3 .3 
Outstanding stock units—vested3.3 8.4 
Outstanding stock units—unvested1.0 2.9 
Available for grant 10.9 10.9 
Authorized for issuance at December 31, 202115.5 22.5 
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
202120202019
To Be Settled With StockTo Be Settled In CashTo Be Settled With StockTo Be Settled In CashTo Be Settled With StockTo Be Settled In Cash
Executive Stock Unit (ESU) program contributions 1
$4.0 $.6 $3.5 $.7 $3.7 $.6 
Discounts on various stock awards:
Deferred Stock Compensation Program 2
1.5 — 2.2 — 2.1 — 
ESU program 1
1.1 — 1.4 — 1.3 — 
Discount Stock Plan 3
.9 — .9 — 1.0 — 
Performance Stock Unit (PSU) awards: 4
     PSU - TSR based 4A
3.1 (1.0)3.2 (.7)2.8 4.1 
     PSU - EBIT CAGR based 4B
4.7 5.0 (1.9)(2.0)3.8 5.3 
     2017 and prior PSU awards 4C
— — — — 1.8 1.0 
Restricted Stock Units (RSU) awards 5
8.2 — 6.8 — 2.0 — 
Other, primarily non-employee directors restricted stock.4 — .9 — 1.4 — 
Total stock-related compensation expense (income)23.9 $4.6 17.0 $(2.0)19.9 $11.0 
Employee contributions for above stock plans10.3 12.2 13.1 
Total stock-based compensation$34.2 $29.2 $33.0 
Tax benefits on stock-based compensation expense$5.8 $4.0 $4.7 
Tax benefits on stock-based compensation payments3.4 2.5 5.6 
Total tax benefits associated with stock-based compensation$9.2 $6.5 $10.3 
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:
20212020
CurrentLong-termTotalCurrentLong-termTotal
Assets:
Diversified investments associated with the ESU program 1
$3.6 $47.4 $51.0 $3.2 $42.7 $45.9 
Liabilities:
ESU program 1
$3.6 $47.3 $50.9 $3.2 $42.2 $45.4 
Performance Stock Unit (TSR) award 4A
— 1.1 1.1 1.9 2.2 4.1 
Performance Stock Unit (EBIT) award 4B
3.5 2.7 6.2 .4 1.3 1.7 
Other - primarily timing differences between employee withholdings and related employer contributions to be submitted to various plans' trust accounts5.6 — 5.6 5.9 — 5.9 
Total liabilities associated with stock-based compensation$12.7 $51.1 $63.8 $11.4 $45.7 $57.1 
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award Stock option information 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, 2020.5 $35.72 
Granted— 41.32 
Exercised (.2)27.83   
Outstanding at December 31, 2021.3 $41.02 5.7$.6 
Vested or expected to vest.3 $41.02 5.7$.6 
Exercisable (vested) at December 31, 2021.3 $41.00 5.4$.6 
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
 202120202019
Total intrinsic value of stock options exercised$4.5 $2.3 $23.6 
Cash received from stock options exercised3.5 1.5 9.3 
Total fair value of stock options vested.1 .9 .3 
Aggregate grant date fair value of options granted * .2 .2 .5 

* We granted .1 options or less in each of the periods presented.
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
 202120202019
TSR Based
Total shares base award.1 .1 .1 
Grant date per share fair value$49.43 $38.23 $57.86 
Risk-free interest rate.2 %1.4 %2.4 %
Expected life in years3.03.03.0
Expected volatility (over expected life)44.3 %24.0 %21.5 %
Expected dividend yield (over expected life)3.7 %3.6 %3.4 %
EBIT CAGR Based
Total shares base award.1 .1 .1 
Grant date per share fair value$38.77 $40.52 $39.98 
Vesting period in years3.03.03.0
Three-Year Performance Cycle for PSU - TSR Based
Award YearCompletion DateTSR Performance
Relative to the Peer Group (1%=Best)		Payout as a
Percent of the
Base Award		Number of Shares
Distributed		Cash PortionDistribution Date
2017December 31, 201963 rd percentile49.0%.1 million$1.6 First quarter 2020
2018December 31, 202060 th percentile56.0%<.1 million$2.0 First quarter 2021
2019December 31, 202178 th percentile—%
—
$— First quarter 2022
Three-Year Performance Cycle for PSU - EBIT CAGR Based
Award YearCompletion DatePayout as a
Percent of the
Base Award		Number of Shares
Distributed		Cash PortionDistribution Date
2018December 31, 202016.0%<.1 million$.4 First quarter 2021
2019December 31, 2021127.0%<.1 million$3.5 First quarter 2022
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
Stock unit information for the plans discussed above is presented in the table below:
DSUESUPSURSUTotal UnitsWeighted
Average
Grant Date
Fair Value
per Unit		Aggregate
Intrinsic
Value
Unvested at December 31, 2020— — .8 .1 .9 $24.07  
Granted based on current service .2 .2 — .3 .7 44.08  
Granted based on future conditions*— — .3 — .3 30.10 
Vested (.2)(.2)(.1)(.2)(.7)38.94 
Forfeited*— — (.2)— (.2)22.37 
Unvested at December 31, 2021— — .8 .2 1.0 $44.41 $39.5 
Fully vested shares available for issuance at December 31, 20213.3 $136.6 

*PSU awards are presented at maximum payout of 200% at grant date and when forfeited.
Stock Units Converted To Common Stock
 Year Ended December 31
 202120202019
Total intrinsic value of vested stock units converted to common stock$10.5 $11.7 $8.0 
Discount Stock Plan
Average 2021 purchase price per share (net of discount)$38.97 
2021 number of shares purchased by employees.1 
Shares purchased since inception in 198223.6 
Maximum shares under the plan27.0 
Deferred Compensation Arrangement with Individual Disclosure, Postretirement Benefits
OptionsUnitsCash
Aggregate amount of compensation deferred during 2021$.1 $5.4 $.5