Stockholders' Equity (Narrative) (Details) - USD ($) shares in Thousands, $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2013
Equity [Abstract]
Stock repurchase program, authorized amount (up to)			$ 8,100.0
Number of shares purchased (in shares)	0	723
Treasury stock value acquired		$ 146.1
Remaining authorized repurchase amount	$ 802.0