Derivative Instruments And Hedging Activities (Narrative) (Details) |
3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2011
USD ($)
|
Sep. 30, 2010
USD ($)
|
Sep. 30, 2011
USD ($)
|
Sep. 30, 2010
USD ($)
|
Sep. 30, 2011 |
Dec. 31, 2010
USD ($)
|
Sep. 30, 2010
Increase [Member]
Provisional Pricing Arrangements [Member]
Product Revenues [Member]
USD ($)
|
Sep. 30, 2011
Minimum [Member]
Twelve Month [Member]
|
Sep. 30, 2011
Maximum [Member]
Twelve Month [Member]
|
Sep. 30, 2011
Twenty Four Month [Member]
|
Sep. 30, 2011
Fifteen Month [Member]
|
Sep. 30, 2011
Accounts Receivable [Member]
USD ($)
|
Sep. 30, 2011
Derivative Assets (Current) [Member]
Customer Supply Agreements [Member]
USD ($)
|
Dec. 31, 2010
Derivative Assets (Current) [Member]
Customer Supply Agreements [Member]
USD ($)
|
Sep. 30, 2011
Foreign Exchange Contracts [Member]
USD ($)
|
Dec. 31, 2010
Foreign Exchange Contracts [Member]
USD ($)
|
Sep. 30, 2010
Foreign Exchange Contracts [Member]
|
Sep. 30, 2011
Foreign Exchange Contracts (Hedge Designation) [Member]
USD ($)
|
Sep. 30, 2011
Foreign Exchange Contracts (Hedge Designation) [Member]
USD ($)
|
Jan. 11, 2011
Foreign Exchange Contracts (Hedge Designation) [Member]
CAD
|
Sep. 30, 2011
Provisional Pricing Arrangements [Member]
USD ($)
|
Sep. 30, 2011
Provisional Pricing Arrangements [Member]
USD ($)
|
Sep. 30, 2010
Provisional Pricing Arrangements [Member]
Product Revenues [Member]
USD ($)
|
Sep. 30, 2011
Changes In Fair Value Of Foreign Currency Contracts [Member]
USD ($)
|
Sep. 30, 2011
Changes In Fair Value Of Foreign Currency Contracts [Member]
USD ($)
|
Sep. 30, 2011
Accumulated Other Comprehensive Income [Member]
|
Sep. 30, 2010
Customer Supply Agreements [Member]
USD ($)
|
Sep. 30, 2011
Customer Supply Agreements [Member]
Product Revenues [Member]
USD ($)
|
Sep. 30, 2010
Customer Supply Agreements [Member]
Product Revenues [Member]
USD ($)
|
Sep. 30, 2011
Customer Supply Agreements [Member]
Product Revenues [Member]
USD ($)
|
Sep. 30, 2010
Customer Supply Agreements [Member]
Product Revenues [Member]
USD ($)
|
Sep. 30, 2011
Product Revenues [Member]
USD ($)
|
Sep. 30, 2010
Product Revenues [Member]
USD ($)
|
Sep. 30, 2011
Product Revenues [Member]
USD ($)
|
Sep. 30, 2010
Product Revenues [Member]
USD ($)
|
Sep. 30, 2011
Pricing Settlement [Member]
USD ($)
|
|
| Percentage of hedging policy allowed anticipated operating cost | 40.00% | 75.00% | 50.00% | 10.00% | ||||||||||||||||||||||||||||||||
| Notional amount of derivative | 4,700,000,000 | |||||||||||||||||||||||||||||||||||
| Gains remain in accumulated other comprehensive loss related to the effective cash flow hedge contracts prior to de-designation | 15,200,000 | 10,300,000 | ||||||||||||||||||||||||||||||||||
| Derivative instruments not designated as hedging instruments, gain (loss), net | 240,600,000 | 290,100,000 | 849,900,000 | 1,087,700,000 | 193,000,000 | 623,500,000 | 53,800,000 | 25,100,000 | 124,900,000 | 93,400,000 | 309,400,000 | |||||||||||||||||||||||||
| Foreign currency cash flow hedge gains to be reclassified to changes in fair value of foreign currency contracts during the next twelve months | 10,300,000 | |||||||||||||||||||||||||||||||||||
| Notional amounts of outstanding exchange rate contracts | 45,000,000 | 230,000,000 | ||||||||||||||||||||||||||||||||||
| Amount of gain/(loss) recognized in income on derivative | (32,500,000) | (24,800,000) | 229,200,000 | 960,700,000 | 6,200,000 | 7,400,000 | 455,700,000 | 53,800,000 | 25,100,000 | 124,900,000 | 93,400,000 | |||||||||||||||||||||||||
| Notional amount of hedged portion of purchase price | 315,000,000 | 315,000,000 | 70,000,000 | |||||||||||||||||||||||||||||||||
| Derivative asset, fair value | 49,000,000 | |||||||||||||||||||||||||||||||||||
| Fair value of derivative assets | 116,800,000 | 116,800,000 | 45,600,000 | 67,800,000 | 45,600,000 | |||||||||||||||||||||||||||||||
| Derivative assets | 73,600,000 | 73,600,000 | 82,600,000 | |||||||||||||||||||||||||||||||||
| Swap resulted in net realized gains | 93,100,000 | |||||||||||||||||||||||||||||||||||
| Foreign currency spot rate | 0.9700 | 0.97 | 0.9700 | |||||||||||||||||||||||||||||||||
| Reclassified gains from accumulated other comprehensive loss related to contracts that settled during the year, recorded the amounts as product revenues | $ 1,800,000 | $ 4,000,000 | ||||||||||||||||||||||||||||||||||