|
Financial instruments (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
Foreign Exchange Contract [Member]
|
Dec. 31, 2011
Foreign Exchange Contract [Member]
Forward Contracts [Member]
|
Dec. 31, 2010
Foreign Exchange Contract [Member]
Forward Contracts [Member]
|
Dec. 31, 2011
Foreign Exchange Contract [Member]
Options Held [Member]
|
Dec. 31, 2010
Foreign Exchange Contract [Member]
Options Held [Member]
|
Dec. 31, 2011
Interest Rate Contract [Member]
|
Dec. 31, 2011
Interest Rate Contract [Member]
Forward Contracts [Member]
|
Dec. 31, 2010
Interest Rate Contract [Member]
Forward Contracts [Member]
|
Dec. 31, 2010
Commodity Contract [Member]
|
Dec. 31, 2011
Commodity Contract [Member]
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||
| Term of derivative instruments, lower range (in months) | 1 M | ||||||||||
| Term of derivative instruments, upper range (in months) | 22 M | ||||||||||
| Derivative [Line Items] | |||||||||||
| Notional values | $ 112.1 | $ 138.3 | $ 106.8 | $ 181.1 | $ 50.0 | $ 14.0 | $ 27.1 | ||||
| Amount of net gain estimated to be reclassified from accumulated other comprehensive loss to cost of sales | 2.8 | (3.8) | |||||||||
| Amount of net deferred gains associated with all interest rate swaps included in accumulated other comprehensive loss | 0.5 | 3.9 | |||||||||
| Amount of terminated forward starting interest rate swaps gain | 250.0 | ||||||||||
| Amount of terminated forward starting interest rate swaps loss | 150.0 | ||||||||||
| Recognized income related to amortization of deferred gains and losses from settled forward starting interest rate swaps | $ 0.9 | ||||||||||