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Consolidated Statements of Changes in Equity - USD ($)
$ in Millions
Total
Common Stock
Retained earnings
AOCI
Non-controlling interests
Beginning balance (in shares) at Dec. 31, 2021   229,299,900      
Beginning balance at Dec. 31, 2021 $ 9,241.7 $ 7,205.5 $ 2,082.9 $ (44.0) $ (2.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 125.6   122.5   3.1
Issuance of stock compensation and reinvested dividends, net of tax withholding (in shares)   176,658      
Issuance of stock compensation and reinvested dividends, net of tax withholding (4.0) $ (4.0)      
Dividends declared on common stock (131.3)   (131.3)    
Dividend equivalents declared (0.8)   (0.8)    
Stock compensation expense 4.3 4.3      
Unearned compensation          
Compensation expense recognized 0.2 0.2      
Derivative hedging activity, net of tax 1.4     1.4  
Other 0.4 $ 0.4      
Ending balance (in shares) at Mar. 31, 2022   229,476,558      
Ending balance at Mar. 31, 2022 9,237.5 $ 7,206.4 2,073.3 (42.6) 0.4
Beginning balance (in shares) at Dec. 31, 2022   229,546,105      
Beginning balance at Dec. 31, 2022 9,493.3 $ 7,219.7 2,298.5 (34.5) 9.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 145.7   142.6   3.1
Issuance of stock compensation and reinvested dividends, net of tax withholding (in shares)   130,594      
Issuance of stock compensation and reinvested dividends, net of tax withholding (2.4) $ (2.4)      
Dividends declared on common stock (140.7)   (140.7)    
Dividend equivalents declared (0.4)   (0.4)    
Stock compensation expense 4.7 4.7      
Unearned compensation          
Compensation expense recognized 0.1 0.1      
Derivative hedging activity, net of tax 1.3     1.3  
Other 0.1 $ 0.1      
Ending balance (in shares) at Mar. 31, 2023   229,676,699      
Ending balance at Mar. 31, 2023 $ 9,501.7 $ 7,222.2 $ 2,300.0 $ (33.2) $ 12.7