Earnings Per Share and Shareholders' Equity Transactions (Narrative) (Details) - USD ($) shares in Thousands			3 Months Ended
	Jan. 29, 2021	Oct. 29, 2020	Mar. 31, 2021	Mar. 31, 2020
Class Of Stock [Line Items]
Antidilutive securities excluded from calculation of earnings per share				600
Accelerated Share Repurchase Agreement [Member]
Class Of Stock [Line Items]
Stock repurchase program, available authorized repurchase amount			$ 78,000,000
October 2020 ASR [Member]
Class Of Stock [Line Items]
Amount paid by company		$ 100,000,000.0
Initial delivery of shares of common stock received		800
Shares repurchased under repurchase agreement, percentage		80.00%
Common stock shares received as final settlement of shares repurchased	45
Maximum [Member] | Accelerated Share Repurchase Agreement [Member]
Class Of Stock [Line Items]
Repurchases common stock, authorized			$ 900,000,000
Stock Compensation Plans [Member]
Class Of Stock [Line Items]
Antidilutive securities excluded from calculation of earnings per share			200	400