v3.19.1

Derivative Instruments (Detail 5) (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Derivative [Line Items] |  |  |  |  |
Derivative, Collateral, Right to Reclaim Cash |  | $ 244 |  | $ 155 |
Net derivative assets (liabilities) | [1] | (141) |  | 76 |
Derivative Asset, Current | [1] | 142 | [2] | 174 | [3]
Derivative Asset, Noncurrent | [1] | 160 | [2] | 218 | [3]
Derivative Asset | [1] | 302 |  | 392 |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | (188) |  | (14) |
Derivative Liability, Collateral, Right to Reclaim Cash, Offset |  | 47 |  | 62 |
Derivative Liability, Current | [1] | (303) | [2] | (197) | [3]
Derivative Liability, Noncurrent | [1] | (140) | [2] | (119) | [3]
Derivative Liability | [1] | (443) |  | (316) |
Future [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Current | [1] | 0 |  | 0 |
Derivative Asset, Noncurrent | [1] | 0 |  | 0 |
Derivative Asset |  | 933 |  | 746 |
Derivative Liability, Current | [1] | 0 |  | 0 |
Derivative Liability, Noncurrent | [1] | 0 |  | 0 |
Derivative Liability |  | (932) |  | (790) |
Interest Rate Contract [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Current | [1] | 30 |  | 7 |
Derivative Asset, Noncurrent | [1] | 10 |  | 19 |
Derivative Asset |  | 40 |  | 29 |
Derivative Liability, Current | [1] | (4) |  | (17) |
Derivative Liability, Noncurrent | [1] | (6) |  | (14) |
Derivative Liability |  | (10) |  | (34) |
Forward Contracts [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Current | [1] | 112 |  | 167 |
Derivative Asset, Noncurrent | [1] | 150 |  | 199 |
Derivative Asset | [4] | 550 |  | 592 |
Derivative Liability, Current | [1] | (299) |  | (180) |
Derivative Liability, Noncurrent | [1] | (134) |  | (105) |
Derivative Liability | [4] | (769) |  | (529) |
Derivative Assets, Current [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement |  | 1,191 | [2] | 1,040 | [3]
Derivative Asset, Collateral, Obligation to Return Cash, Offset |  | (1,049) | [2] | (866) | [3]
Derivative Assets, Current [Member] | Future [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement |  | 820 |  | 672 |
Derivative Asset, Collateral, Obligation to Return Cash, Offset |  | (820) |  | (672) |
Derivative Assets, Current [Member] | Interest Rate Contract [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement |  | 30 |  | 7 |
Derivative Asset, Collateral, Obligation to Return Cash, Offset |  | 0 |  | 0 |
Derivative Assets, Current [Member] | Forward Contracts [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement |  | 341 |  | 361 |
Derivative Asset, Collateral, Obligation to Return Cash, Offset |  | (229) |  | (194) |
Derivative Assets, Non-current [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement |  | 332 | [2] | 327 | [3]
Derivative Asset, Collateral, Obligation to Return Cash, Offset |  | (172) | [2] | (109) | [3]
Derivative Assets, Non-current [Member] | Future [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement |  | 113 |  | 74 |
Derivative Asset, Collateral, Obligation to Return Cash, Offset |  | (113) |  | (74) |
Derivative Assets, Non-current [Member] | Interest Rate Contract [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement |  | 10 |  | 22 |
Derivative Asset, Collateral, Obligation to Return Cash, Offset |  | 0 |  | (3) |
Derivative Assets, Non-current [Member] | Forward Contracts [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement |  | 209 |  | 231 |
Derivative Asset, Collateral, Obligation to Return Cash, Offset |  | (59) |  | (32) |
Derivative Liabilities, Current [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | (1,344) | [2] | (1,108) | [3]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset |  | 1,041 | [2] | 911 | [3]
Derivative Liabilities, Current [Member] | Future [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | (764) |  | (702) |
Derivative Liability, Collateral, Right to Reclaim Cash, Offset |  | 764 |  | 702 |
Derivative Liabilities, Current [Member] | Interest Rate Contract [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | (4) |  | (17) |
Derivative Liability, Collateral, Right to Reclaim Cash, Offset |  | 0 |  | 0 |
Derivative Liabilities, Current [Member] | Forward Contracts [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | (576) |  | (389) |
Derivative Liability, Collateral, Right to Reclaim Cash, Offset |  | 277 |  | 209 |
Derivative Liabilities, Non-current [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | (367) | [2] | (245) | [3]
Derivative Liability, Collateral, Right to Reclaim Cash, Offset |  | 227 | [2] | 126 | [3]
Derivative Liabilities, Non-current [Member] | Future [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | (168) |  | (88) |
Derivative Liability, Collateral, Right to Reclaim Cash, Offset |  | 168 |  | 88 |
Derivative Liabilities, Non-current [Member] | Interest Rate Contract [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | (6) |  | (17) |
Derivative Liability, Collateral, Right to Reclaim Cash, Offset |  | 0 |  | 3 |
Derivative Liabilities, Non-current [Member] | Forward Contracts [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | (193) |  | (140) |
Derivative Liability, Collateral, Right to Reclaim Cash, Offset |  | 59 |  | 35 |
Derivative Financial Instruments, Assets [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement |  | 1,523 |  | 1,367 |
Derivative Asset, Collateral, Obligation to Return Cash, Offset |  | (1,221) |  | (975) |
Derivative Financial Instruments, Liabilities [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement |  | (1,711) |  | (1,353) |
Derivative Liability, Collateral, Right to Reclaim Cash, Offset |  | $ 1,268 |  | $ 1,037 |
[1] | At December 31, 2018 and 2017, we had $244 million and $155 million of collateral under master netting arrangements that were not offset against our derivative instruments on the Consolidated Balance Sheets primarily related to initial margin requirements.
[2] | At December 31, 2018, current and long-term derivative assets are shown net of collateral of $(58) million and $(8) million, respectively, and current and long-term derivative liabilities are shown net of collateral of $49 million and $64 million, respectively.
[3] | At December 31, 2017, current and long-term derivative assets are shown net of collateral of $(8) million and $(2) million, respectively, and current and long-term derivative liabilities are shown net of collateral of $52 million and $20 million, respectively.
[4] | Includes OTC swaps and options.

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