Supplemental Information (Earnings Per Share) (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share Reconciliation [Abstract]
Weighted-average Common Shares Outstanding – Basic	258,200,000	256,100,000	258,000,000.0	255,200,000
Assumed settlement of performance share units and restricted stock units	1,000,000.0	1,100,000	1,100,000	1,300,000
Dilutive effect of forward sale agreements	200,000	0	100,000	0
Weighted-average Common Shares Outstanding – Diluted	259,400,000	257,200,000	259,200,000	256,500,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)			0	0