Basis of Presentation (Earnings per share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net income	$ 638,775	$ 627,928	$ 1,891,379	$ 1,735,086
Less: earnings distributed to participating securities	(121)	(202)	(369)	(635)
Less: undistributed earnings allocated to participating securities	(2,083)	(3,534)	(6,685)	(10,288)
Numerator for basic earnings per share	636,571	624,192	1,884,325	1,724,163
Add back: undistributed earnings allocated to participating securities	2,083	3,534	6,685	10,288
Less: undistributed earnings reallocated to participating securities	(2,066)	(3,508)	(6,636)	(10,218)
Numerator for diluted earnings per share	$ 636,588	$ 624,218	$ 1,884,374	$ 1,724,233
Denominator:
Basic shares outstanding (shares)	218,288	230,967	221,832	237,639
Effect of dilutive securities (shares)	1,394	1,333	1,152	1,240
Diluted shares outstanding (shares)	219,682	232,300	222,984	238,879
Earnings Per Share [Abstract]
Basic earnings (usd per share)	$ 2.92	$ 2.70	$ 8.49	$ 7.26
Diluted earnings (usd per share)	$ 2.90	$ 2.69	$ 8.45	$ 7.22