Stockholders' Equity and Stock-Based Compensation (Summary of Options Outstanding) (Details) shares in Millions	12 Months Ended
	Dec. 31, 2023 $ / shares shares
$50.37 to $70.73
Options, exercise price, lower range limit (in usd per share)	$ 50.37
Options, exercise price, upper range limit (in usd per share)	$ 70.73
Outstanding, shares (in millions) (in shares) | shares	1.7
Outstanding, average exercise price (in usd per share)	$ 58.40
Outstanding, average remaining life (in years)	2 years
Exercisable, shares (in millions) (in shares) | shares	1.7
Exercisable, average exercise price (in usd per share)	$ 58.40
$70.74 to $100.80
Options, exercise price, lower range limit (in usd per share)	70.74
Options, exercise price, upper range limit (in usd per share)	$ 100.80
Outstanding, shares (in millions) (in shares) | shares	3.5
Outstanding, average exercise price (in usd per share)	$ 82.43
Outstanding, average remaining life (in years)	3 years
Exercisable, shares (in millions) (in shares) | shares	3.5
Exercisable, average exercise price (in usd per share)	$ 82.43
$100.81 to $167.29
Options, exercise price, lower range limit (in usd per share)	100.81
Options, exercise price, upper range limit (in usd per share)	$ 167.29
Outstanding, shares (in millions) (in shares) | shares	4.1
Outstanding, average exercise price (in usd per share)	$ 120.82
Outstanding, average remaining life (in years)	5 years
Exercisable, shares (in millions) (in shares) | shares	2.5
Exercisable, average exercise price (in usd per share)	$ 117.47
$167.30 to $221.34
Options, exercise price, lower range limit (in usd per share)	167.30
Options, exercise price, upper range limit (in usd per share)	$ 221.34
Outstanding, shares (in millions) (in shares) | shares	3.8
Outstanding, average exercise price (in usd per share)	$ 209.86
Outstanding, average remaining life (in years)	8 years
Exercisable, shares (in millions) (in shares) | shares	0.5
Exercisable, average exercise price (in usd per share)	$ 196.95
$221.35 to $266.20
Options, exercise price, lower range limit (in usd per share)	221.35
Options, exercise price, upper range limit (in usd per share)	$ 266.20
Outstanding, shares (in millions) (in shares) | shares	2.6
Outstanding, average exercise price (in usd per share)	$ 242.31
Outstanding, average remaining life (in years)	8 years
Exercisable, shares (in millions) (in shares) | shares	0.8
Exercisable, average exercise price (in usd per share)	$ 245.07