Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended			3 Months Ended
	May 31, 2013	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2013 Weighted Average [Member]	Dec. 31, 2013 Cost of Sales and Selling and Administrative Expenses [Member]	Dec. 31, 2012 Cost of Sales and Selling and Administrative Expenses [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill		$ 559	$ 504
Goodwill annual impairment	0
Useful life of intangible assets				6 years	20 years	19 years
Amortization of intangible assets							4	3
Amortization expense estimated for year one		18
Amortization expense estimated for year two		18
Amortization expense estimated for year three		18
Amortization expense estimated for year four		18
Amortization expense estimated for year five		18
Asset impairment charges	$ 0