Common Stock, Preferred Stock and Equity Plans (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) vote $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) shares	Dec. 30, 2016 $ / shares	Jul. 31, 2016 $ / shares	Jun. 30, 2016 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award
Common stock, shares authorized (shares)	500,000,000	500,000,000
Common stock, votes per share (votes per share) | vote	1
Preferred stock, shares authorized (shares)	1,000,000	1,000,000
Preferred stock, shares issued (shares)	0	0
Awards outstanding (shares)	16,187,626
Additional awards authorized for grant (shares)	9,180,002
Grant price of outstanding restricted stock and restricted stock units (usd per share) | $ / shares		$ 10.00
Stock Options
Stock options outstanding at beginning of period (in shares)	11,145,000
Stock options granted (in shares)	3,183,000
Stock options exercised (in shares)	(1,064,000)
Stock options forfeited (in shares)	(544,000)
Stock options expired (in shares)	(78,000)
Stock options outstanding at end of period (in shares)	12,642,000	11,145,000
Stock options exercisable at end of period (in shares)	7,323,000
Total exercisable or expected to vest, stock options (in shares)	12,200,000
Weighted-average Exercise Price
Weighted-average exercise price outstanding at beginning of period (usd per share) | $ / shares	$ 75.99
Weighted average exercise price, granted (usd per share) | $ / shares	91.36
Weighted average exercise price, exercised (usd per share) | $ / shares	45.61
Weighted average exercise price, forfeited (usd per share) | $ / shares	94.62
Weighted average exercise price, expired (usd per share) | $ / shares	107.51
Weighted-average exercise price outstanding at end of period (usd per share) | $ / shares	81.41	$ 75.99
Weighted average exercise price exercisable at the end of the period (usd per share) | $ / shares	68.92
Total exercisable or expected to vest, weighted average exercise price (usd per share) | $ / shares	$ 80.76
Weighted-average Remaining Contractual Life
Weighted-average Remaining Contractual Life, outstanding (in years)	7 years 22 days
Weighted-average Remaining Contractual Life, exercisable (in years)	6 years
Weighted-average Remaining Contractual Life, total exercisable or expected to vest (in years)	7 years
Aggregate Intrinsic Value
Aggregate intrinsic value, outstanding | $	$ 124,939
Aggregate intrinsic value, exercisable | $	121,671
Aggregate intrinsic value, total exercisable or expected to vest | $	124,892
Total Intrinsic Value and Cash Received
Total intrinsic value of stock options exercised | $	48,600	$ 252,900	$ 316,500
Total cash received from employees as a result of employee stock option exercises | $	$ 48,500	$ 165,600	$ 255,500
Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Expiration period (years)	10 years
Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award
Share price (in dollars per share) | $ / shares				$ 74.11
2013 Stock and Option Plan
Share-based Compensation Arrangement by Share-based Payment Award
Awards outstanding (shares)	9,832,269
Additional awards authorized for grant (shares)	9,180,002
Additional shares authorized (shares)		7,800,000	9,500,000
2006 Stock and Option Plan
Share-based Compensation Arrangement by Share-based Payment Award
Awards outstanding (shares)	6,355,357
Additional awards authorized for grant (shares)	0
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award
Grant price of outstanding restricted stock and restricted stock units (usd per share) | $ / shares					$ 0	$ 0.01