Stock-Based Compensation (Details 4) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Long-Term Performance Based Plans
Stock option activity
Total options outstanding at the end of the period (in shares)	7,929,250	9,549,375	10,978,750
Weighted-Average Exercise Price
Total options outstanding at the end of the period (in dollars per share)	$ 18.85	$ 19.20	$ 15.98
Stock options
Stock option activity
Total options outstanding at the beginning of the period (in shares)	21,336,159	21,918,500	21,861,691
Granted (in shares)	591,500	3,246,000	2,450,500
Exercised (in shares)	(4,940,393)	(2,347,341)	(448,729)
Forfeited and cancelled (in shares)	(587,396)	(1,481,000)	(1,944,962)
Total options outstanding at the end of the period (in shares)	16,399,870	21,336,159	21,918,500
Exercisable at the end of the period (in shares)	6,011,719	8,389,683	7,590,264
Weighted-Average Exercise Price
Total options outstanding, beginning of the period (in dollars per share)	$ 20.53	$ 18.62	$ 21.71
Granted (in dollars per share)	$ 32.25	$ 28.55	$ 18.34
Exercised (in dollars per share)	$ 18.46	$ 15.73	$ 9.23
Forfeited and cancelled (in dollars per share)	$ 20.44	$ 17.44	$ 22.26
Total options outstanding at the end of the period (in dollars per share)	$ 19.04	$ 20.53	$ 18.62
Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 18.31	$ 21.70	$ 22.83
Share-based compensation additional disclosures
Tax benefit from stock awards exercised	$ 23,378	$ 9,911	$ 1,665
Aggregate intrinsic value
Aggregate intrinsic value of stock options outstanding	284,630
Aggregate intrinsic value of stock options exercisable	$ 108,769