Accrued Expenses - Components of Accrued Expenses (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Salaries and benefits	$ 1,075		$ 1,251
Product warranties	180	$ 189	207	$ 227	$ 254	$ 286
Dividends payable (see Note 11)	232		237
Partner rebates	204		235
Restructuring, current (See Note 12)	162		123
Derivatives	51		75
Other	927		1,013
Accrued Liabilities, Current, Total	$ 2,831		$ 3,141