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Debt - Long-Term Debt Table (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified |
6 Months Ended | 6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2014
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Dec. 31, 2013
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Jun. 30, 2014
Corporate Revolving Bank Credit Facility [Member]
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Dec. 31, 2013
Corporate Revolving Bank Credit Facility [Member]
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Jun. 30, 2014
Oilfield Services Revolving Bank Credit Facility [Member]
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Dec. 31, 2013
Oilfield Services Revolving Bank Credit Facility [Member]
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Jun. 30, 2014
Interest Rate Contract [Member]
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Dec. 31, 2013
Interest Rate Contract [Member]
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Jun. 30, 2014
2.75% Contingent Convertible Senior Notes Due 2035 [Member]
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Jun. 30, 2014
2.5% Contingent Convertible Senior Notes due 2037 [Member]
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Jun. 30, 2014
2.25% Contingent Convertible Senior Notes Due 2038 [Member]
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Jun. 30, 2014
Secured Debt [Member]
Senior Secured Term Loan Due 2017 [Member]
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Dec. 31, 2013
Secured Debt [Member]
Senior Secured Term Loan Due 2017 [Member]
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Jun. 30, 2014
Senior Notes [Member]
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Apr. 24, 2014
Senior Notes [Member]
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Dec. 31, 2013
Senior Notes [Member]
|
Jun. 30, 2014
Senior Notes [Member]
9.5% Senior Notes Due 2015 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
9.5% Senior Notes Due 2015 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
3.25% Senior Notes due 2016 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
3.25% Senior Notes due 2016 [Member]
|
Jun. 30, 2013
Senior Notes [Member]
3.25% Senior Notes due 2016 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
6.25% Euro-Denominated Senior Notes Due 2017 [ Member]
|
Dec. 31, 2013
Senior Notes [Member]
6.25% Euro-Denominated Senior Notes Due 2017 [ Member]
|
Jun. 30, 2014
Senior Notes [Member]
6.25% Euro-Denominated Senior Notes Due 2017 [ Member]
Cross Currency Interest Rate Contract [Member]
|
Dec. 31, 2013
Senior Notes [Member]
6.25% Euro-Denominated Senior Notes Due 2017 [ Member]
Cross Currency Interest Rate Contract [Member]
|
Jun. 30, 2014
Senior Notes [Member]
6.5% Senior Notes Due 2017 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
6.5% Senior Notes Due 2017 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
6.875% Senior Notes Due 2018 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
6.875% Senior Notes Due 2018 [Member]
|
Jun. 30, 2013
Senior Notes [Member]
6.875% Senior Notes Due 2018 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
7.25% Senior Notes Due 2018 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
7.25% Senior Notes Due 2018 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
Floating Rate Senior Notes due 2019 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
Floating Rate Senior Notes due 2019 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
6.625% Senior Notes Due 2019 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
6.625% Senior Notes Due 2019 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
6.625% Senior Notes Due 2020 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
6.625% Senior Notes Due 2020 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
6.875% Senior Notes Due 2020 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
6.875% Senior Notes Due 2020 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
6.125% Senior Notes Due 2021 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
6.125% Senior Notes Due 2021 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
5.375% Senior Notes due 2021 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
5.375% Senior Notes due 2021 [Member]
|
Jun. 30, 2013
Senior Notes [Member]
5.375% Senior Notes due 2021 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
4.875% Senior Notes due 2022 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
4.875% Senior Notes due 2022 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
5.75% Senior Notes due 2023 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
5.75% Senior Notes due 2023 [Member]
|
Jun. 30, 2013
Senior Notes [Member]
5.75% Senior Notes due 2023 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
2.75% Contingent Convertible Senior Notes Due 2035 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
2.75% Contingent Convertible Senior Notes Due 2035 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
2.5% Contingent Convertible Senior Notes due 2037 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
2.5% Contingent Convertible Senior Notes due 2037 [Member]
|
Jun. 30, 2014
Senior Notes [Member]
2.25% Contingent Convertible Senior Notes Due 2038 [Member]
|
Dec. 31, 2013
Senior Notes [Member]
2.25% Contingent Convertible Senior Notes Due 2038 [Member]
|
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| Long-Term Debt Instrument [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-term Debt, Gross | $ 1,500 | $ 0 | $ 0 | $ 0 | $ 405 | $ 10 | $ 13 | $ 0 | $ 2,000 | $ 3,000 | $ 3,000 | $ 0 | $ 1,265 | $ 500 | $ 500 | $ 500 | $ 471 | $ 473 | $ 471 | $ 660 | $ 660 | $ 0 | $ 97 | $ 669 | $ 669 | $ 1,500 | $ 0 | $ 0 | $ 650 | $ 1,300 | $ 1,300 | $ 500 | $ 500 | $ 1,000 | $ 1,000 | $ 700 | $ 700 | $ 700 | $ 1,500 | $ 0 | $ 1,100 | $ 1,100 | $ 1,100 | $ 396 | $ 396 | $ 1,168 | $ 1,168 | $ 347 | $ 347 | |||||||
| Total long-term debt, net | 11,549 | 12,886 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Instrument, Unamortized Discount | $ (272) | $ (357) | $ (33) | $ (264) | $ (303) | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative, Forward Exchange Rate | 1.3692 | 1.3743 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 9.50% | 3.25% | 3.25% | 6.25% | 6.50% | 6.875% | 6.875% | 7.25% | 6.625% | 6.625% | 6.875% | 6.125% | 5.375% | 5.375% | 4.875% | 5.75% | 5.75% | 2.75% | 2.50% | 2.25% | ||||||||||||||||||||||||||||||||||||
| Percentage Of Principal Amount Of Notes For Repurchase Requirement Of Contingent Convertible Senior Notes | 100.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Instrument, Convertible, Terms of Conversion Feature | 5 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Common Stock Price Conversion Thresholds | $ 45.22 | $ 59.71 | $ 100.45 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Instrument, Date of First Required Payment | May 14, 2016 | Nov. 14, 2017 | Jun. 14, 2019 | |||||||||||||||||||||||||||||||||||||||||||||||||||||