Environmental Matters, Litigation and Product Warranties - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2013 defendent federal_superfund_site LegalMatter State
Environmental Matters, Litigation and Product Warranties [Line Items]
Number of Federal Super Fund sites				1
Environmental remediation accrual, discounted basis	$ 17			$ 17
Portion of environmental remediation costs recorded in other current liabilities	5			5
Portion of environmental remediation costs recorded in deferred credits and other liabilities	12			12
Weighted average discount rate	2.10%			2.10%
Environmental remediation accrual, undiscounted basis	20			20
Cost of services, environmental remediation, next twelve months	3			3
Cost of services, environmental remediation, year two	2			2
Cost of services, environmental remediation, year three	1			1
Cost of services, environmental remediation, year four	1			1
Cost of services, environmental remediation, year five	1			1
Cost of services, environmental remediation, thereafter	12			12
Number of states for which we are subject to an audit with respect to payment of unclaimed property				11
Number of years subject to audit with respect to payment of unclaimed property				30 years
Number of complaints filed alleging exposure to asbestos from our product categories				20,000
Current docket of active and inactive cases nationwide relating to alleged exposure to asbestos from our product categories (less than 500 cases)				500
Number of defendants in many asbestos related cases				100
Premium freight and overtime costs incurred	$ 2	$ 3	$ 2	$ 2