Earnings Per Share and Shareholders' Equity Transactions (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accelerated Share Repurchase Program
Class Of Stock [Line Items]
Stock repurchase program, available authorized repurchase amount	$ 330,000,000
Common stock shares received as final settlement of shares repurchased			900,000
Amount paid by company			$ 100,000,000.0
Accelerated Share Repurchase Program | Maximum [Member]
Class Of Stock [Line Items]
Repurchases common stock, authorized	$ 1,300,000,000
Open Market Purchases [Member]
Class Of Stock [Line Items]
Repurchased common shares	200,000	1,200,000	1,100,000
Stock Compensation Plans [Member]
Class Of Stock [Line Items]
Antidilutive securities excluded from calculation of earnings per share	100,000	200,000	400,000