Stock-Based Compensation (Summary of Restricted Stock Unit and Performance Based Restricted Stock Unit Activity) (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Outstanding | shares	267
Number of Shares, Granted | shares	257
Number of Shares, Vested | shares	(110)
Number of Shares, Forfeited/canceled | shares	(5)
Number of Shares, Outstanding | shares	409
Weighted-Average Grant Date Fair Value per Share, Outstanding | $ / shares	$ 269.08
Weighted-Average Grant Date Fair Value per Share, Granted | $ / shares	217.02
Weighted-Average Grant Date Fair Value per Share, Vested | $ / shares	271.27
Weighted-Average Grant Date Fair Value per Share, Forfeited/canceled | $ / shares	254.56
Weighted-Average Grant Date Fair Value per Share, Outstanding | $ / shares	$ 235.91
Performance Stock Units (PSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Outstanding | shares	368
Number of Shares, Granted | shares	59
Number of Shares, Adjustment | shares	11
Number of Shares, Vested | shares	(155)
Number of Shares, Forfeited/canceled | shares	(2)
Number of Shares, Outstanding | shares	281
Weighted-Average Grant Date Fair Value per Share, Outstanding | $ / shares	$ 298.46
Weighted-Average Grant Date Fair Value per Share, Granted | $ / shares	291.51
Weighted-Average Grant Date Fair Value per Share, Adjustment | $ / shares	236.63
Weighted-Average Grant Date Fair Value per Share, Vested | $ / shares	236.32
Weighted-Average Grant Date Fair Value per Share, Forfeited/canceled | $ / shares	376.76
Weighted-Average Grant Date Fair Value per Share, Outstanding | $ / shares	$ 314.08
Performance period	3 years