Common Stock - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation, Effect on Earnings Per Share, Basic	$ 0.01	$ 0.02	$ 0.04	$ 0.05
Share-based compensation, effect on earnings per share, diluted	$ 0.01	$ 20,000.00	$ 40,000.00	$ 50,000.00
Share based compensation	$ 3	$ 2	$ 8	$ 7
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	3
Weighted average grant-date fair value of options granted			$ 26.46	$ 19.84
Total fair value of shares vested			6	5
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	400,000		400,000
Treasury Stock, Shares, Acquired	2,844,692		2,844,692		2,844,692,000,000
Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized compensation costs	8		8
Unrecognized compensation costs, weighted average period			1 year 4 months 24 days
Cash received from stock option exercises			1	10
Restricted Stock, Restricted Stock Units, Long Term Performance Units, SARs [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized compensation costs	25		25
Unrecognized compensation costs, weighted average period			2 years 0 months 0 days
Share based compensation	5	5	10	8
Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized compensation costs	8		8
Unrecognized compensation costs, weighted average period			2 years 1 month 6 days
Total fair value of restricted shares vested			7	5
Selling, General and Administrative Expenses [Member] | Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Compensation expense related to nonqualified stock options	1	1	3	3
UNITED STATES | Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Cash received from stock option exercises				17
UNITED STATES | Employee Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Cash received from stock option exercises				$ 14