Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands, shares in Millions	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive loss
Common stock, shares outstanding		160.2
Balances	$ 5,469,000	$ 40,000	$ 11,900	$ 5,421,900	$ (4,800)
Net income	309,400			309,400
Exercise and settlement of share-based awards, net of shares withheld for taxes (in shares)		0.7
Exercise and settlement of share-based awards, net of shares withheld for taxes	(11,700)	$ 200	(11,900)
Share-based compensation expense	49,700		49,700
Repurchase of common stock (in shares)		(1.8)
Repurchase of common stock	166,300	$ 500	45,800	120,000
Dividends declared	(99,400)			(99,400)
Other comprehensive loss	(800)				(800)
Net income	738,000
Common stock, shares outstanding		159.1
Balances	5,549,900	$ 39,700	3,900	5,511,900	(5,600)
Net income	232,800			232,800
Exercise and settlement of share-based awards, net of shares withheld for taxes (in shares)		0.2
Exercise and settlement of share-based awards, net of shares withheld for taxes	14,900	$ 0	14,900
Share-based compensation expense	43,000		43,000
Repurchase of common stock (in shares)		(0.1)
Repurchase of common stock	9,100	$ 0	5,600	3,500
Dividends declared	(98,600)			(98,600)
Common stock, shares outstanding		159.2
Balances	5,732,900	$ 39,700	56,200	5,642,600	(5,600)
Net income	195,800			195,800
Exercise and settlement of share-based awards, net of shares withheld for taxes (in shares)		0.0
Exercise and settlement of share-based awards, net of shares withheld for taxes	(900)	$ 100	(1,000)
Share-based compensation expense	48,800		48,800
Dividends declared	(98,700)			(98,700)
Common stock, shares outstanding		159.2
Balances	$ 5,877,900	$ 39,800	104,000	5,739,700	(5,600)
Common stock, shares outstanding	159.5	159.5
Balances	$ 6,082,700	$ 39,900	172,400	5,876,000	(5,600)
Net income	231,300			231,300
Exercise and settlement of share-based awards, net of shares withheld for taxes (in shares)		0.7
Exercise and settlement of share-based awards, net of shares withheld for taxes	(30,400)	$ 200	(30,600)
Share-based compensation expense	52,600		52,600
Dividends declared	(108,900)			(108,900)
Other comprehensive loss	(100)				(100)
Net income	535,500
Common stock, shares outstanding		160.2
Balances	6,227,200	$ 40,100	194,400	5,998,400	(5,700)
Net income	183,300			183,300
Exercise and settlement of share-based awards, net of shares withheld for taxes (in shares)		0.2
Exercise and settlement of share-based awards, net of shares withheld for taxes	17,500	$ 0	17,500
Share-based compensation expense	40,300		40,300
Dividends declared	(109,100)			(109,100)
Common stock, shares outstanding		160.4
Balances	6,359,200	$ 40,100	252,200	6,072,600	(5,700)
Net income	120,900			120,900
Exercise and settlement of share-based awards, net of shares withheld for taxes (in shares)		0.1
Exercise and settlement of share-based awards, net of shares withheld for taxes	(1,000)	$ 0	(1,000)
Share-based compensation expense	43,800		43,800
Repurchase of common stock (in shares)		(0.8)
Repurchase of common stock	77,400	$ 200	77,200	0
Dividends declared	$ (109,100)			(109,100)
Common stock, shares outstanding	159.7	159.7
Balances	$ 6,336,400	$ 39,900	$ 217,800	$ 6,084,400	$ (5,700)