Supplemental Information (Earnings Per Share) (Details) - shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share Reconciliation [Abstract]
Weighted-average Common Shares Outstanding – Basic	257,900,000	254,400,000
Assumed settlement of performance share units and restricted stock units	1,100,000	1,500,000
Weighted-average Common Shares Outstanding – Diluted	259,000,000.0	255,900,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	0	0