Share-Based Compensation Plans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($) CompensationPlan $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employee stock purchase programs | CompensationPlan	2
Share-based compensation	$ 90,000,000	$ 81,800,000	$ 71,400,000
Share-based payment arrangements, income tax benefit	30,200,000	27,700,000	24,200,000
Unrecognized compensation expenses related to share-based payment arrangements	$ 144,300,000
Weighted-average period of recognizing unrecognized compensation expenses related to share-based compensation, in years	2 years
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 23,900,000	$ 22,600,000	$ 19,400,000
Unrecognized compensation expenses related to share-based payment arrangements	$ 31,600,000
Weighted-average period of recognizing unrecognized compensation expenses related to share-based compensation, in years	2 years
Awards requisite service period	4 years
Award contractual terms	10 years
Minimum number of years for accelerated vesting	2 years
Stock options vested | shares	650,782	730,082	709,882
Weighted average fair value of stock options vested | $ / shares	$ 31.45	$ 26.11	$ 23.07
Total intrinsic value of stock options exercised	$ 91,700,000	$ 94,600,000	$ 95,700,000
Cash received from stock option exercises	75,000,000	89,400,000	120,900,000
Actual tax benefit realized from option exercises	$ 30,300,000	$ 32,100,000	$ 32,200,000
Fair value assumptions, risk-free interest rate	1.60%	1.30%	1.20%
Fair value assumptions, dividend yield	0.50%	0.50%	0.60%
Fair value assumptions, expected life in years	7 years 4 months 24 days	6 years 6 months	6 years 6 months
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 23,100,000	$ 23,800,000	$ 21,700,000
Unrecognized compensation expenses related to share-based payment arrangements	$ 52,900,000
Weighted-average period of recognizing unrecognized compensation expenses related to share-based compensation, in years	2 years
Nonvested other stock-based awards, shares outstanding | shares	473,088	471,920
Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards requisite service period	4 years
Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards requisite service period	5 years
Other Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 9,100,000	$ 7,300,000	7,100,000
Unrecognized compensation expenses related to share-based payment arrangements	$ 31,700,000
Weighted-average period of recognizing unrecognized compensation expenses related to share-based compensation, in years	4 years
Other Restricted Stock Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards requisite service period	4 years
Other Restricted Stock Units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards requisite service period	7 years
Performance Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 18,800,000	$ 14,900,000	$ 12,700,000
Unrecognized compensation expenses related to share-based payment arrangements	$ 19,400,000
Weighted-average period of recognizing unrecognized compensation expenses related to share-based compensation, in years	2 years
Awards requisite service period	3 years
Fair value assumptions, risk-free interest rate	0.83%	0.86%	0.70%
Fair value assumptions, dividend yield	0.52%	0.51%	0.62%
Fair value assumptions, expected life in years	2 years 10 months 24 days	2 years 9 months 18 days	2 years 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	These units have requisite service periods of three years and have no dividend rights.
Period over which the company's performance is evaluated	3 years
Nonvested other stock-based awards, shares outstanding | shares	313,412	304,751
Other Stock-Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 800,000	$ 800,000	$ 900,000
Unrecognized compensation expenses related to share-based payment arrangements	$ 400,000
Weighted-average period of recognizing unrecognized compensation expenses related to share-based compensation, in years	2 years
Awards requisite service period	3 years
Nonvested other stock-based awards, shares outstanding | shares	13,076	13,741
Management Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 10,700,000	$ 9,200,000	6,700,000
Unrecognized compensation expenses related to share-based payment arrangements	$ 8,300,000
Weighted-average period of recognizing unrecognized compensation expenses related to share-based compensation, in years	2 years
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	Only shares or units corresponding to the 30% discount are forfeited if the employee's employment terminates prior to the end of the four-year vesting period. Dividends or dividend-equivalents are paid on MSPP shares or units, and the participant has the right to vote all MSPP shares.
Discount on common stock purchase program	30.00%
Minimum annual bonus percentage required to purchase restricted stock	25.00%
Period restricted for sale or transfer after purchase	4 years
Vesting period, years	4 years
2012 Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of remaining shares that may be issued | shares	3,639,647
Directors Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of remaining shares that may be issued | shares	21,890
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 3,600,000	$ 3,200,000	$ 2,900,000
Fair value assumptions, risk-free interest rate	0.45%	0.14%	0.08%
Fair value assumptions, dividend yield	0.50%	0.60%	0.60%
Fair value assumptions, expected life in years	6 months	6 months	6 months
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	All participant funds received prior to the ESPP purchase dates are held as company liabilities without interest or other increment. No dividends are paid on employee contributions until shares are purchased.
Discount on common stock purchase program	15.00%
Period restricted for sale or transfer after purchase	6 months
After tax payroll deductions percentage of compensation, minimum	1.00%
After tax payroll deductions percentage of compensation, maximum	10.00%
After tax payroll deductions maximum amount of compensation as defined by the plan	$ 20,000
Employee payroll deduction period	6 months
Shares available to purchase during period under Employee Stock Purchase Plan | shares	185,383
Shares purchased under Employee Stock Purchase Plan | shares	94,841	107,359