Employee Benefit Plans (Options Outstanding and Exercisable) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted- Average Remaining Contractual Life in Years	2 years 9 months 18 days
$ 45.01 - $ 50.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 45.01
Range of Exercise Prices, Maximum	$ 50.00
50.01 - 55.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 50.01
Range of Exercise Prices, Maximum	$ 55.00
55.01 - 60.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 55.01
Range of Exercise Prices, Maximum	$ 60.00
70.01 - 75.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 70.01
Range of Exercise Prices, Maximum	$ 75.00
Options Outstanding [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options Outstanding	4,738,690
Weighted-Average Exercise Price, Options Outstanding	$ 54.35
Weighted- Average Remaining Contractual Life in Years	6 years 6 months 4 days
Options Outstanding [Member] | $ 45.01 - $ 50.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options Outstanding	1,082,490
Weighted-Average Exercise Price, Options Outstanding	$ 48.29
Weighted- Average Remaining Contractual Life in Years	6 years 5 months 12 days
Options Outstanding [Member] | 50.01 - 55.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options Outstanding	2,638,965
Weighted-Average Exercise Price, Options Outstanding	$ 52.48
Weighted- Average Remaining Contractual Life in Years	6 years 4 months 13 days
Options Outstanding [Member] | 55.01 - 60.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options Outstanding	425,775
Weighted-Average Exercise Price, Options Outstanding	$ 57.66
Weighted- Average Remaining Contractual Life in Years	2 years 10 months 13 days
Options Outstanding [Member] | 70.01 - 75.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options Outstanding	591,460
Weighted-Average Exercise Price, Options Outstanding	$ 71.38
Weighted- Average Remaining Contractual Life in Years	9 years 9 months 29 days
Options Exercisable [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options Exercisable	3,018,822
Weighted-Average Exercise Price, Option Exercisable	$ 52.17
Options Exercisable [Member] | $ 45.01 - $ 50.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options Exercisable	697,440
Weighted-Average Exercise Price, Option Exercisable	$ 49.66
Options Exercisable [Member] | 50.01 - 55.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options Exercisable	1,896,857
Weighted-Average Exercise Price, Option Exercisable	$ 51.87
Options Exercisable [Member] | 55.01 - 60.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options Exercisable	424,525
Weighted-Average Exercise Price, Option Exercisable	$ 57.66
Options Exercisable [Member] | 70.01 - 75.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Options Exercisable	0
Weighted-Average Exercise Price, Option Exercisable	$ 0.00