Annual report pursuant to Section 13 and 15(d)

CASH AND INVESTMENTS - Summary of Marketable Securities (Detail)

v3.3.1.900
CASH AND INVESTMENTS - Summary of Marketable Securities (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Trading Securities, Short-term Investments, Amortized Cost $ 1,425 $ 430
Trading Securities, Gross Unrealized Gain 9 0
Trading Securities, Gross Unrealized Loss (5) 0
Trading Securities 1,429 430
Available-for-sale Securities, Amortized Cost Basis 569 562
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 1 2
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax (3) (2)
Available-for-sale Securities, Current 567 562
Marketable Securities, Amortized Cost, Total 1,994 992
Marketable Securities, Gross Unrealized Gain 10 2
Marketable Securities, Gross Unrealized Loss (8) (2)
Marketable securities 1,996 992
U.S. government and agency debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 341 321
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0 1
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax (1) (1)
Available-for-sale Securities, Current 340 321
Mortgage and asset-backed debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 74 89
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 1 1
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax (1) (1)
Available-for-sale Securities, Current 74 89
Corporate debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Trading Securities, Short-term Investments, Amortized Cost 715 388
Trading Securities, Gross Unrealized Gain 0 0
Trading Securities, Gross Unrealized Loss 0 0
Trading Securities 715 388
Available-for-sale Securities, Amortized Cost Basis 147 146
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax (1) 0
Available-for-sale Securities, Current 146 146
U.S. state and local municipal debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 2 2
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Available-for-sale Securities, Current 2 2
Equity securities    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 2 3
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Available-for-sale Securities, Current 2 3
Non-U.S. government debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Trading Securities, Short-term Investments, Amortized Cost 363 42
Trading Securities, Gross Unrealized Gain 0 0
Trading Securities, Gross Unrealized Loss 0 0
Trading Securities 363 42
Available-for-sale Securities, Amortized Cost Basis 3 1
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Available-for-sale Securities, Current 3 1
Carbon credit investments    
Schedule of Available-for-sale Securities [Line Items]    
Trading Securities, Short-term Investments, Amortized Cost 347 0
Trading Securities, Gross Unrealized Gain 9 0
Trading Securities, Gross Unrealized Loss (5) 0
Trading Securities $ 351 $ 0