Employee Stock-Based Compensation and Benefit Plans (Narrative) (Details) (USD $)	1 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2012 months		Dec. 31, 2011		Dec. 31, 2010
Performance period used to determine stock grants	3 years
Expected volatility rate, calculation basis, period		2 years 9 months
Stock-based compensation		$ 149,940,000	[1]	$ 92,909,000	[1]	$ 103,758,000	[1]
Related deferred tax assets		46,700,000		28,400,000		31,100,000
Tax benefit from compensation expense		65,800,000		67,900,000		100,100,000
Share-based compensation award, stock vesting period, monthly installments		12
The weighted average fair value per share of stock options granted (per share)		$ 23.95		$ 29.91		$ 13.74
2005 Plan
Shares authorized for issuance under 2005 Equity Incentive Plan		48,600,000
Ownership percentage of company where incentive stock options must be granted with an exercise price greater than fair market value		10.00%
Exercise price of incentive stock options granted to individuals owning 10% or more of the Company's common stock, as a percentage of fair market value of common stock on the date of grant		110.00%
Shares reserved for issuance under the 2005 Equity Incentive Plan		30,315,044
Shares available for grant under the 2005 Equity Incentive Plan		18,801,748
2005 ESPP Plan
Shares authorized for issuance under 2005 Equity Incentive Plan		10,000,000
Employee Stock Purchase Plan, minimum payroll deduction as a percentage of base pay		1.00%
Employee Stock Purchase Plan, maximum payroll deduction as a percentage of base pay		10.00%
Employee Stock Purchase Plan, maximum number of shares per period that employees can purchase		12,000
Employee Stock Purchase Plan, purchase price as a percentage of fair market value		85.00%
Employee Stock Purchase Plan, employee disqualification, ownership percent of outstanding stock		5.00%
Employee Stock Purchase Plan, total shares issued under plan		2,581,202
Stock-based compensation		4,000,000		3,500,000		2,800,000
Market and Service Condition Stock Units [Member]
Non-vested stock unit awards granted to senior level employees	418,809
Period to determine actual stock grant following end of performance period	60 days
Maximum percentage of market and service condition stock units that will ultimately vest	200.00%
Percentage that Company's return exceeds indexed return	40.00%
Percentage that Company's return underperforms index	20.00%
Percent of award issued if return is negative but Index is met	75.00%
Granted		$ 89.95
Expected dividend yield		0.00%
Employee Stock Option [Member]
Stock-based compensation		56,400,000		48,200,000		67,000,000
Life of assumed options		5 years
Stock option vesting period		3 years
Stock-based compensation award vesting period, percentage of award vesting each year		33.30%
Stock-based compensation award vesting period, percentage of award vesting each month		2.78%
Total unrecognized compensation cost related to stock-based compensation		68,900,000
Total unrecognized compensation cost recognition period (in years)		1 year 7 months 6 days
The total intrinsic value of options exercised		131,400,000		169,200,000		293,700,000
Expected dividend yield		0.00%		0.00%		0.00%
Non-Vested Stock Unit Awards [Member]
Non-vested stock unit awards granted to senior level employees		2,465,988
Granted		$ 78.72
Stock-based compensation		89,500,000		40,000,000		19,300,000
Performance goal, percentage of attainment required to earn performance-based award		90.00%
Minimum percentage of performance-based awards that will ultimately vest		90.00%
Maximum percentage of performance-based awards that will ultimately vest		125.00%
Stock-based compensation award vesting period, percentage of award vesting each year		33.33%
Stock-based compensation award vesting period, percent vested on third anniversary of grant date		100.00%
Fair value of awards released		50,300,000		21,300,000		11,600,000
Total unrecognized compensation cost related to stock-based compensation		195,500,000
Total unrecognized compensation cost recognition period (in years)		2 years 1 month 13 days
Defined Contribution Pension [Member]
401(k) Benefit Plan [Abstract]
Maximum annual contribution per employee (as a percent)		60.00%
Contribution per dollar of employee contribution		0.50
Matching percent		3.00%
Contributions		$ 10,500,000		$ 9,100,000		$ 8,000,000
Vesting period (in years)		4 years
Vesting rate		25.00%

[1] Represents expenses presented to management on a consolidated basis only and not allocated to the operating segments.