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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted The following table presents the calculation of our basic and diluted EPS:
Three Months Ended
June 30,
Six Months Ended
 June 30,
(in millions, except per share amounts)2021202020212020
Numerator:
Net Income (Loss) Available to Common Shareholders - Basic46.5 (18.5)328.2 43.3 
Dilutive effect of Series A Equity Units0.4 — 0.4 — 
Net Income (Loss) Available to Common Shareholders - Diluted46.9 (18.5)328.6 43.3 
Denominator:
Average common shares outstanding - Basic393.0 383.5 392.8 383.3 
Dilutive potential common shares:
Series A Equity Units28.2 — 14.2 — 
Shares contingently issuable under employee stock plans0.8 — 0.7 0.7 
Shares restricted under employee stock plans0.3 — 0.3 0.2 
Forward Agreements0.6 — 0.5 — 
Average Common Shares - Diluted422.9 383.5 408.5 384.2 
Earnings per common share:
Basic0.12 (0.05)0.84 0.11 
Diluted0.11 (0.05)0.80 0.11