Annual report pursuant to Section 13 and 15(d)

CASH AND INVESTMENTS - Summary of Marketable Securities (Detail)

v3.6.0.2
CASH AND INVESTMENTS - Summary of Marketable Securities (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]    
Trading Securities, Short-term Investments, Amortized Cost $ 507 $ 1,425
Trading Securities, Gross Unrealized Gain 10 9
Trading Securities, Gross Unrealized Loss 0 (5)
Trading Securities 517 1,429
Available-for-sale Securities, Amortized Cost Basis 576 569
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 1 1
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax (3) (3)
Available-for-sale Securities, Current 574 567
Marketable Securities, Amortized Cost, Total 1,083 1,994
Marketable Securities, Gross Unrealized Gain 11 10
Marketable Securities, Gross Unrealized Loss (3) (8)
Marketable securities 1,091 1,996
U.S. government and agency debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 314 341
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax (2) (1)
Available-for-sale Securities, Current 312 340
Mortgage and asset-backed debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 90 74
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 1 1
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax 0 (1)
Available-for-sale Securities, Current 91 74
Corporate debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Trading Securities, Short-term Investments, Amortized Cost 427 715
Trading Securities, Gross Unrealized Gain 0 0
Trading Securities, Gross Unrealized Loss 0 0
Trading Securities 427 715
Available-for-sale Securities, Amortized Cost Basis 167 147
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax (1) (1)
Available-for-sale Securities, Current 166 146
U.S. state and local municipal debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Amortized Cost Basis   2
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax   0
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax   0
Available-for-sale Securities, Current   2
Equity 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
Non-U.S. government debt securities    
Schedule of Available-for-sale Securities [Line Items]    
Trading Securities, Short-term Investments, Amortized Cost   363
Trading Securities, Gross Unrealized Gain   0
Trading Securities, Gross Unrealized Loss   0
Trading Securities   363
Available-for-sale Securities, Amortized Cost Basis 3 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 3 3
Carbon credit investments    
Schedule of Available-for-sale Securities [Line Items]    
Trading Securities, Short-term Investments, Amortized Cost 80 347
Trading Securities, Gross Unrealized Gain 10 9
Trading Securities, Gross Unrealized Loss 0 (5)
Trading Securities $ 90 $ 351