Stock-Based Compensation Plans - Outstanding Stock Options and SARs (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Number of outstanding Number of exercisable, Shares	2,582,074
Weighted Average Remaining Contractual Life (in years)	2 years 5 months 9 days
Weighted Average Exercise Price, Outstanding	$ 56.36	$ 52.52	$ 41.47	$ 37.20
Number of exercisable, Shares	1,421,356
Weighted Average Exercise Price, Exercisable	$ 48.79
Range of Exercise Prices One
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price, Minimum	$ 31.13
Exercise Price, Maximum	$ 39.99
Number of outstanding Number of exercisable, Shares	44,980
Weighted Average Remaining Contractual Life (in years)	2 months 27 days
Weighted Average Exercise Price, Outstanding	$ 34.48
Number of exercisable, Shares	44,980
Weighted Average Exercise Price, Exercisable	$ 34.48
Range of Exercise Prices Two
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price, Minimum	$ 40.00
Exercise Price, Maximum	$ 49.99
Number of outstanding Number of exercisable, Shares	1,007,979
Weighted Average Remaining Contractual Life (in years)	1 year 1 month 6 days
Weighted Average Exercise Price, Outstanding	$ 44.82
Number of exercisable, Shares	917,558
Weighted Average Exercise Price, Exercisable	$ 44.39
Range of Exercise Prices Three
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price, Minimum	$ 50.00
Exercise Price, Maximum	$ 59.99
Number of outstanding Number of exercisable, Shares	404,799
Weighted Average Remaining Contractual Life (in years)	2 years 4 months 17 days
Weighted Average Exercise Price, Outstanding	$ 52.35
Number of exercisable, Shares	227,838
Weighted Average Exercise Price, Exercisable	$ 52.35
Range of Exercise Prices Four
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price, Minimum	$ 60.00
Exercise Price, Maximum	$ 69.99
Number of outstanding Number of exercisable, Shares	657,040
Weighted Average Remaining Contractual Life (in years)	3 years 4 months 2 days
Weighted Average Exercise Price, Outstanding	$ 64.17
Number of exercisable, Shares	208,043
Weighted Average Exercise Price, Exercisable	$ 64.22
Range of Exercise Prices Five
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price, Minimum	$ 70.00
Exercise Price, Maximum	$ 79.99
Number of outstanding Number of exercisable, Shares	466,480
Weighted Average Remaining Contractual Life (in years)	4 years 3 months 29 days
Weighted Average Exercise Price, Outstanding	$ 75.85
Number of exercisable, Shares	22,141
Weighted Average Exercise Price, Exercisable	$ 77.26
Range of Exercise Prices Six
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise Price, Minimum	$ 80.00
Exercise Price, Maximum	$ 80.34
Number of outstanding Number of exercisable, Shares	796
Weighted Average Remaining Contractual Life (in years)	4 years 3 months
Weighted Average Exercise Price, Outstanding	$ 80.34
Number of exercisable, Shares	796
Weighted Average Exercise Price, Exercisable	$ 80.34