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Stock-Based Compensation (Number Of Shares And Related Grant Date Fair Value Of PSU) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Grant date per share fair value (in dollars per share)       $ 17.99    
Award Year 2018            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
TSR Performance Relative to the Peer Group (1%=Best)     60.00%      
Payout as a Percent of the Base Award     56.00%      
Number of shares distributed (in shares)     0.1      
Cash Portion     $ 2.0      
Award Year 2019            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
TSR Performance Relative to the Peer Group (1%=Best)   78.00%        
Payout as a Percent of the Base Award   0.00%        
Number of shares distributed (in shares)   0.0        
Cash Portion   $ 0.0        
Award Year 2020 | Forecast            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
TSR Performance Relative to the Peer Group (1%=Best) 87.00%          
Payout as a Percent of the Base Award 0.00%          
Number of shares distributed (in shares) 0.0          
Cash Portion $ 0.0          
Award Year 2018, PSU - EBIT CAGR            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Payout as a Percent of the Base Award     16.00%      
Number of shares distributed (in shares)     0.1      
Cash Portion     $ 0.4      
Award Year 2019, PSU - EBIT CAGR            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Payout as a Percent of the Base Award   127.00%        
Number of shares distributed (in shares)   0.1        
Cash Portion   $ 3.5        
Award Year 2020, PSU - EBIT CAGR | Forecast            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Payout as a Percent of the Base Award 0.00%          
Number of shares distributed (in shares) 0.0          
Cash Portion $ 0.0          
TSR Based | Performance Stock Unit            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total shares base award (in shares)       0.1 0.1 0.1
Grant date per share fair value (in dollars per share)       $ 41.13 $ 49.43 $ 38.23
Risk-free interest rate       1.70% 0.20% 1.40%
Expected life in years       3 years 3 years 3 years
Expected volatility (over expected life)       45.20% 44.30% 24.00%
Expected dividend yield (over expected life)       4.60% 3.70% 3.60%
EBIT CAGR Based | Performance Stock Unit            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total shares base award (in shares)       0.1 0.1 0.1
Grant date per share fair value (in dollars per share)       $ 32.88 $ 38.77 $ 40.52
Vesting period in years       3 years 3 years 3 years