Share-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost related to nonvested awards, unrecognized	$ 26,000,000
Weighted-average period to recognize compensation cost (in years)	3 years
Aggregate intrinsic value for outstanding options and RSUs	154,000,000	90,300,000
Aggregate intrinsic value for vested options and RSUs	93,600,000	57,600,000
Weighted-average remaining contractual life for outstanding options and RSUs, in years	6 years
Weighted-average remaining contractual life for exercisable options and RSUs, in years	5 years
Share-based compensation	12,648,000	10,747,000	7,547,000
Income tax benefit	5,100,000	4,300,000	3,000,000
Weighted-average, risk-free interest	2.00%	2.00%	3.60%
Weighted-average, dividend yield	3.20%	3.30%	3.80%
Weighted-average, annual historical volatility factor	19.00%	19.00%	19.00%
Weighted-average, expected life	7 years
Weighted-average, estimated turnover	5.00%
Fair value of shares vested	8,100,000	6,700,000	7,200,000
Weighted-average grant date fair value of options and SARs granted	$ 10.14	$ 7.96	$ 8.18
Aggregate intrinsic value of options exercised	43,900,000	41,500,000	25,100,000
Granted, Shares	172,000
Excess tax benefits	$ 12,905,000	$ 11,018,000	$ 5,356,000
Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares	727,000	858,000	1,028,000
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares	172,000	145,000	126,000