v3.8.0.1
Derivative Instruments (Detail 3) (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative assets, current [1],[2] $ 206 $ 221
Derivative Asset, Noncurrent [1],[2] 284 300
Long-term derivative liabilities [1],[2] (103) (149)
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 192 162
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 82 72
Derivative Liability, Current [1],[2] (113) (138)
Derivative Liability [2] (216) (287)
Derivative, Collateral, Right to Reclaim Cash 115 262
Derivative, Fair Value, Net [2] 274 234
Derivative Asset [2] 490 521
Derivative Financial Instruments, Assets [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 1,319 2,268
Derivative Asset, Collateral, Obligation to Return Cash, Offset (829) (1,747)
Future [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative assets, current [2] 0 0
Derivative Asset, Noncurrent [2] 0 0
Long-term derivative liabilities [2] 0 0
Derivative Liability, Current [2] 0 0
Derivative Liability (656) (1,570)
Derivative Asset 605 1,542
Forward Contracts [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative assets, current [2] 205 220
Derivative Asset, Noncurrent [2] 274 272
Long-term derivative liabilities [2] (85) (119)
Derivative Liability, Current [2] (88) (110)
Derivative Liability [3] (419) (478)
Derivative Asset [3] 694 697
Interest Rate Hedging Instruments    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative assets, current [2] 1 1
Derivative Asset, Noncurrent [2] 10 28
Long-term derivative liabilities [2] (18) (30)
Derivative Liability, Current [2] (25) (28)
Derivative Liability (52) (58)
Derivative Asset 20 29
Fair Value, Inputs, Level 3 [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Margin/Cash (Received) Posted Subject to Master Netting Arrangement 14 17
Fair Value, Inputs, Level 3 [Member] | Future [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability 0 0
Derivative Asset 0 0
Fair Value, Inputs, Level 3 [Member] | Forward Contracts [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability [3] (64) (67)
Derivative Asset [3] 332 466
Fair Value, Inputs, Level 3 [Member] | Interest Rate Hedging Instruments    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability 0 0
Derivative Asset 0 0
Derivative Assets, Current [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 812 [4] 1,725 [1]
Derivative Asset, Collateral, Obligation to Return Cash, Offset (606) [4] (1,504) [1]
Derivative Assets, Current [Member] | Future [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 472 1,344
Derivative Asset, Collateral, Obligation to Return Cash, Offset (472) (1,344)
Derivative Assets, Current [Member] | Forward Contracts [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 338 380
Derivative Asset, Collateral, Obligation to Return Cash, Offset (133) (160)
Derivative Assets, Current [Member] | Interest Rate Hedging Instruments    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 2 1
Derivative Asset, Collateral, Obligation to Return Cash, Offset (1) 0
Derivative Assets, Non-current [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 507 [4] 543 [1]
Derivative Asset, Collateral, Obligation to Return Cash, Offset (223) [4] (243) [1]
Derivative Assets, Non-current [Member] | Future [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 133 198
Derivative Asset, Collateral, Obligation to Return Cash, Offset (133) (198)
Derivative Assets, Non-current [Member] | Forward Contracts [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 356 317
Derivative Asset, Collateral, Obligation to Return Cash, Offset (82) (45)
Derivative Assets, Non-current [Member] | Interest Rate Hedging Instruments    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement 18 28
Derivative Asset, Collateral, Obligation to Return Cash, Offset (8) 0
Derivative Liabilities, Current [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 758 [4] 1,630 [1]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 645 [4] 1,492 [1]
Derivative Liabilities, Current [Member] | Future [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 496 1,327
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 496 1,327
Derivative Liabilities, Current [Member] | Forward Contracts [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 236 275
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 148 165
Derivative Liabilities, Current [Member] | Interest Rate Hedging Instruments    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 26 28
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 1 0
Derivative Liabilities, Non-current [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 369 [4] 476 [1]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 266 [4] 327 [1]
Derivative Liabilities, Non-current [Member] | Future [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 160 243
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 160 243
Derivative Liabilities, Non-current [Member] | Forward Contracts [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 183 203
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 98 84
Derivative Liabilities, Non-current [Member] | Interest Rate Hedging Instruments    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 26 30
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 8 0
Derivative Financial Instruments, Liabilities [Member]    
Derivative Instruments Subject to Master Netting Arrangement [Line Items]    
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement 1,127 2,106
Derivative Liability, Collateral, Right to Reclaim Cash, Offset $ 911 $ 1,819
[1] At December 31, 2016, current and long-term derivative assets are shown net of collateral of $(29) million and $(3) million, respectively, and current and long-term derivative liabilities are shown net of collateral of $19 million and $85 million, respectively.
[2] At September 30, 2017 and December 31, 2016, we had $115 million and $262 million of collateral under master netting arrangements that were not offset against our derivative instruments on the Consolidated Condensed Balance Sheets.
[3] Includes OTC swaps and options and retail contracts.
[4] At September 30, 2017, current and long-term derivative assets are shown net of collateral of $(4) million and $(8) million, respectively, and current and long-term derivative liabilities are shown net of collateral of $43 million and $51 million, respectively.