| **Goodwill and Intangible Assets - Impairment Charge by Segment (Details) (USD $)In Millions, unless otherwise specified** | 12 Months Ended |
|----------------------------------------------------------------------------------------------------------------------------|-----------------|
||
| **Acquired Indefinite-lived Intangible Assets [Line Items]**                                                               |            |   |   |
| Impairment of trade names                                                                                                  | $ 0             | $ 0 | $ 315 |
| North America                                                                                                              |            |   |   |
| **Acquired Indefinite-lived Intangible Assets [Line Items]**                                                               |            |   |   |
| Impairment of trade names                                                                                                  |            |   | 105 |
| Latin America                                                                                                              |            |   |   |
| **Acquired Indefinite-lived Intangible Assets [Line Items]**                                                               |            |   |   |
| Impairment of trade names                                                                                                  |            |   | 64 |
| Europe/Africa/Russia Caspian                                                                                               |            |   |   |
| **Acquired Indefinite-lived Intangible Assets [Line Items]**                                                               |            |   |   |
| Impairment of trade names                                                                                                  |            |   | 48 |
| Middle East/Asia Pacific                                                                                                   |            |   |   |
| **Acquired Indefinite-lived Intangible Assets [Line Items]**                                                               |            |   |   |
| Impairment of trade names                                                                                                  |            |   | 47 |
| Industrial Services                                                                                                        |            |   |   |
| **Acquired Indefinite-lived Intangible Assets [Line Items]**                                                               |            |   |   |
| Impairment of trade names                                                                                                  |            |   | 51 |
| Total                                                                                                                      |            |   |   |
| **Acquired Indefinite-lived Intangible Assets [Line Items]**                                                               |            |   |   |
| Impairment of trade names                                                                                                  |            |   | $ 315 |

| X                                                                                                                                                                                    |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_AcquiredIndefiniteLivedIntangibleAssetsLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275
+ Details**Name:**us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |