Summary of Significant Accounting Policies - Changes in Company's Accrued Product Warranty Costs (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Accrued product warranty costs:
Balance at January 1	$ 99	$ 99
Acquisitions during this period		2
Accruals for product warranties issued during the period	71	71
Changes to accruals for product warranties existing before January 1	1	3
Foreign currency translation adjustments	(2)
Settlements made during the period	(67)	(76)
Liabilities held for sale	(9)
Balance at December 31	$ 93	$ 99