Stock-Based Compensation Plans (Summary Of Stock Option Award Activity) (Detail) (Stock Options [Member], USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013		Dec. 31, 2012
Stock Options [Member]
Number of of Shares
Outstanding at December 31, 2012		6,172,194	[1]
Granted		408,603	[1]
Exercised		(1,348,938)	[1]
Forfeited, canceled or expired		(84,022)	[1]
Outstanding at December 31, 2013		5,147,837	[1]	6,172,194	[1]
Vested and expected to vest at December 31, 2013		5,142,351	[1]
Exercisable at December 31, 2013		3,674,485	[1]
Weighted Average Exercise Price
Outstanding at December 31, 2012 (in USD per share)		$ 36.17
Granted (in USD per share)	$ 36.18	$ 84.65		$ 42.02
Exercised (in USD per share)		$ 35.48
Forfeited, canceled or expired (in USD per share)		$ 43.97
Outstanding at December 31, 2013 (in USD per share)		$ 40.08		$ 36.17
Vested and expected to vest at December 31, 2013 (in USD per share)		$ 40.04
Exercisable at December 31, 2013 (in USD per share)		$ 34.63
Weighted Average Remaining Contractual Term
Vested and expected to vest at December 31, 2013 (in years)		6 years
Exercisable at December 31, 2013 (in years)		5 years 3 months 18 days
Aggregate Intrinsic Value
Vested and expected to vest at December 31, 2013 (in USD)		$ 266
Exercisable at December 31, 2013 (in USD)		$ 210

[1] (a) Includes an immaterial number of stock appreciation rights.