Financial Instruments by Balance Sheet Grouping (Detail) (USD $) In Millions, unless otherwise specified	Mar. 29, 2015		Dec. 31, 2014
Assets
Selected financial assets	$ 45,884		$ 53,627
Liabilities
Selected financial liabilities	37,481		37,371
Cash and Cash Equivalents [Member]
Assets
Selected financial assets	1,345		1,389
Short-term Investments [Member]
Assets
Selected financial assets	24,145		32,779
Long-term Investments [Member]
Assets
Selected financial assets	18,289		17,518
Other Current Assets [Member]
Assets
Selected financial assets	1,073	[1]	1,059	[1]
Other Noncurrent Assets [Member]
Assets
Selected financial assets	1,032	[2]	881	[2]
Short-Term Borrowings, Including Current Portion of Long-Term Debt [Member]
Liabilities
Selected financial liabilities	6,555		5,141
Other Current Liabilities [Member]
Liabilities
Selected financial liabilities	174	[3]	93	[3]
Long-term Debt [Member]
Liabilities
Selected financial liabilities	29,370		31,541
Other Noncurrent Liabilities [Member]
Liabilities
Selected financial liabilities	$ 1,382	[4]	$ 596	[4]

[1] As of March 29, 2015, derivative instruments at fair value include interest rate swaps ($1 million), foreign currency swaps ($500 million) and foreign currency forward-exchange contracts ($572 million) and, as of December 31, 2014, include interest rate swaps ($34 million), foreign currency swaps ($494 million) and foreign currency forward-exchange contracts ($531 million).

[2] As of March 29, 2015, derivative instruments at fair value include interest rate swaps ($934 million), foreign currency swaps ($76 million) and foreign currency forward-exchange contracts ($22 million) and, as of December 31, 2014, include interest rate swaps ($767 million), foreign currency swaps ($99 million) and foreign currency forward-exchange contracts ($15 million).

[3] As of March 29, 2015, derivative instruments at fair value include interest rate swaps ($1 million), foreign currency swaps ($33 million) and foreign currency forward-exchange contracts ($140 million) and, as of December 31, 2014, include interest rate swaps ($1 million), foreign currency swaps ($13 million) and foreign currency forward-exchange contracts ($78 million).

[4] As of March 29, 2015, derivative instruments at fair value include interest rate swaps ($71 million), foreign currency swaps ($1.3 billion) and foreign currency forward-exchange contracts ($1 million) and, as of December 31, 2014, include interest rate swaps ($16 million) and foreign currency swaps ($581 million).