Equity-Based Compensation (Stock Options And Stock Appreciation Rights Activity) (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning, shares	5,638	7,709
Exercised, shares	(2,725)	(1,459)
Forfeited or expired, shares	(249)	(612)
Outstanding at end, shares	2,664	5,638
Exercisable, shares	2,664
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning, weighted average exercise price	$ 68.45	$ 57.58	$ 53.37
Exercised, weighted average exercise price	$ 45.93	$ 38.09
Forfeited or expired, weighted average exercise price	$ 68.80	$ 51.03
Outstanding at end, weighted average exercise price	$ 68.45	$ 57.58	$ 53.37
Exercisable, weighted average exercise price	$ 68.45
Weighted average remaining contractual term, years	2 years 3 months 18 days
Outstanding at end, aggregate intrinsic value	$ 20
Exercisable, weighted average remaining contractual term, years	2 years 3 months 18 days
Exercisable, aggregate intrinsic value	$ 20