Common Stock - Additional Information (Detail) - USD ($)		1 Months Ended		3 Months Ended					12 Months Ended
	Feb. 01, 2017	May 31, 2014	Dec. 31, 1999	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Feb. 28, 2017	Oct. 31, 2015	Jan. 31, 2015	Jan. 31, 2014	Dec. 31, 2013	May 15, 2013	May 13, 2009	Mar. 12, 2002
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number				606,525	759,327	940,965	1,125,527		606,525	1,144,719
Authorized common stock available for issuance under the plan				135,000,000					135,000,000
Common stock, par value				$ 0.01					$ 0.01
Common stock, shares issued				65,891,930					65,891,930	65,067,132
Treasury stock shares				11,655,938				3,244,692	11,655,938	7,473,325	3,244,692					2,844,692
Term for stock options (in years)			3 years						1 day	1 day	5 years
Restriction period for restricted common stock			3 years
Decrease in basic earnings per share									$ 0.03	$ 0.06
Share based compensation									$ 14,000,000	$ 15,000,000	$ 13,000,000
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options									$ 1,000,000	$ 6,000,000	12,000,000
Weighted average grant-date fair value of options granted										$ 26.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number				560,238					560,238
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value				$ 12,000,000					$ 12,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price				$ 37.01					$ 37.01
Weighted Average Remaining Life in Years				2 years 7 months 6 days	2 years 9 months 17 days	3 years 1 month 6 days	3 years 6 months			3 years 7 months 6 days
Total Intrinsic value of options exercised					$ 4,000,000	$ 5,000,000	$ 1,000,000		$ 11,000,000	$ 10,000,000	30,000,000
Total fair value of shares vested									$ 4,000,000	$ 6,000,000	$ 6,000,000
Weighted average grant-date fair value of restricted stock granted									$ 36.36	$ 52.85	$ 55.26
Total fair value of restricted shares vested									$ 9,000,000	$ 7,000,000	$ 8,000,000
Number of shares authorized to be repurchased														350,000,000	400,000
Stock repurchased during the period								$ 22,000,000	$ 225,000,000	$ 213,000,000
Treasury stock average cost per share								$ 56.06	$ 53.89	$ 50.32
Share-based Compensation, Effect on Earnings Per Share, Basic									$ 0.01	$ 0.03	$ 0.06
Stock Appreciation Rights (SARs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Restriction period for restricted common stock									3 years
Stock Option
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Compensation expense related to nonqualified stock options									$ 1,000,000	$ 2,000,000	$ 3,000,000
Unrecognized compensation costs				1,000,000					$ 1,000,000
Unrecognized compensation costs, weighted average period									1 month 6 days
Employee Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Cash received from stock option exercises									$ 16,000,000	4,000,000	10,000,000
Restricted stock, restricted stock units, long term performance units, SARs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized compensation costs				22,000,000					$ 22,000,000
Unrecognized compensation costs, weighted average period									1 year 9 months 18 days
Share based compensation									$ 18,000,000	$ 12,000,000	$ 13,000,000
Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized compensation costs				$ 13,000,000					$ 13,000,000
Unrecognized compensation costs, weighted average period									1 year 10 months 24 days
Weighted average grant-date fair value of restricted stock granted				$ 55.45	$ 55.02		$ 35.98
Supplemental Stock Ownership Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Authorized treasury shares available for purchase under the supplemental stock ownership plan			1,100,000
2002 Long-Term Incentive Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Authorized common stock available for issuance under the plan																			4,000,000
2006 Long-Term Incentive Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Authorized common stock available for issuance under the plan																	3,500,000.0	2,300,000.0
Count of each share from a stock option award against shares available for issuance under the plan																		1
Count of each share from a full value award against shares available for issuance under the plan																	1.49	1.25
Shares of common stock remain authorized for delivery				2,541,470					2,541,470
Less - Common Stock Held as Treasury Stock, at Cost
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock Repurchase Program, Authorized Amount													$ 200,000,000
Less - Common Stock Held as Treasury Stock, at Cost | Open Market [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock repurchased during period		400,000							4,182,613	4,228,633
Maximum [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Term for stock options (in years)			20 years
Minimum [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Term for stock options (in years)			7 years
2012 Through 2014 [Member] | Performance Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Restriction period for restricted common stock									3 years
2014 Through 2016 [Member] | Performance Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Restriction period for restricted common stock									3 years
Subsequent event
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Number of shares authorized to be repurchased												400,000,000
Remaining amount authorized to be repurchased												$ 112,000,000
Quarterly cash divided declared (in dollars per share)	$ 0.25