Other Long-Term Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Noncurrent
Pension and other employee benefits	$ 2,041	$ 2,198
Deferred tax liabilities	195	168
Litigation reserves	24	32
Business optimization reserves	18	38
Contingent payment liabilities	20	51
All other	127	450
Other long-term liabilities	$ 2,425	$ 2,937