Shareholders' Equity (Narrative) (Details) - USD ($)		1 Months Ended				12 Months Ended
	Feb. 14, 2024	Jul. 31, 2023	Apr. 30, 2023	Feb. 28, 2023	Oct. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2024	Nov. 30, 2023	May 31, 2023	Mar. 31, 2023	Aug. 31, 2022	Jul. 29, 2016
Equity Class Of Treasury Stock [Line Items]
Shares repurchase program, repurchased cost						$ 133,300,000	$ 165,000,000	$ 80,000,000
Quarterly dividends declared		$ 0.254	$ 0.254	$ 0.254	$ 0.28
Dividends payable, date to be paid, year and month										2023-11	2023-05	2023-03	2023-08
Scenario Forecast [Member]
Equity Class Of Treasury Stock [Line Items]
Quarterly dividends declared	$ 0.28
Dividends payable, date to be paid, year and month									2024-03
Common Stock
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, remaining authorized repurchase amount						$ 716,800,000
Shares repurchase program, shares repurchased						1,785,825	1,889,742	784,901
Common Stock | Share Repurchase Program Excluding Accelerated Share Repurchase
Equity Class Of Treasury Stock [Line Items]
Shares repurchase program, shares repurchased						1,800,000
Shares repurchase program, repurchased cost						$ 132,000,000
Shares repurchase program, average price per share						$ 73.91
Common Stock | Share Repurchase Program Including Accelerated Share Repurchase
Equity Class Of Treasury Stock [Line Items]
Shares repurchase program, shares repurchased						14,200,000
Shares repurchase program, repurchased cost						$ 983,200,000
Shares repurchase program, average price per share						$ 69.32
Common Stock | July 2018 program | Maximum [Member]
Equity Class Of Treasury Stock [Line Items]
Shares repurchase program, authorized amount														$ 150,000,000
Common Stock | December 2026 program | Maximum [Member]
Equity Class Of Treasury Stock [Line Items]
Shares repurchase program, authorized amount														$ 1,700,000,000