Stock-Based Compensation (Summary of Restricted Stock Unit and Performance Based Restricted Stock Unit Activity) (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Outstanding | shares	222
Number of Shares, Granted | shares	181
Number of Shares, Vested | shares	(119)
Number of Shares, Forfeited/canceled | shares	(17)
Number of Shares, Outstanding | shares	267
Weighted-Average Grant Date Fair Value per Share, Outstanding | $ / shares	$ 280.66
Weighted-Average Grant Date Fair Value per Share, Granted | $ / shares	253.11
Weighted-Average Grant Date Fair Value per Share, Vested | $ / shares	264.41
Weighted-Average Grant Date Fair Value per Share, Forfeited/canceled | $ / shares	274.69
Weighted-Average Grant Date Fair Value per Share, Outstanding | $ / shares	$ 269.08
Performance Stock Units (PSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Outstanding | shares	429
Number of Shares, Granted | shares	97
Number of Shares, Adjustment | shares	65
Number of Shares, Vested | shares	(207)
Number of Shares, Forfeited/canceled | shares	(16)
Number of Shares, Outstanding | shares	368
Weighted-Average Grant Date Fair Value per Share, Outstanding | $ / shares	$ 332.18
Weighted-Average Grant Date Fair Value per Share, Granted | $ / shares	263.17
Weighted-Average Grant Date Fair Value per Share, Adjustment | $ / shares	302.96
Weighted-Average Grant Date Fair Value per Share, Vested | $ / shares	345.08
Weighted-Average Grant Date Fair Value per Share, Forfeited/canceled | $ / shares	299.23
Weighted-Average Grant Date Fair Value per Share, Outstanding | $ / shares	$ 298.46
Performance period	3 years