Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities (Detail) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans		$ 215	$ 215
Other noncurrent liabilities	[1]	(1,010)	(891)
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans		215	215
Marketable securities		37	44
Total noncurrent financial assets		252	259
Senior notes		(2,766)	(2,262)
Commercial paper		(938)	(1,072)
Other long-term debt		(99)	(108)
Other noncurrent liabilities		(63)	(57)
Total noncurrent financial liabilities		(3,866)	(3,499)
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior, mezzanine, and other loans		209	214
Marketable securities		37	44
Total noncurrent financial assets		246	258
Senior notes		(2,826)	(2,370)
Commercial paper		(938)	(1,072)
Other long-term debt		(108)	(122)
Other noncurrent liabilities		(63)	(57)
Total noncurrent financial liabilities		$ (3,935)	$ (3,621)

[1] See Footnote No. 17, “Related Party Transactions,” to our Consolidated Financial Statements for disclosure of related party amounts.