DERIVATIVE FINANCIAL INSTRUMENTS (Details) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended						6 Months Ended
	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Jun. 30, 2011 EUR (€)	Dec. 31, 2010 USD ($)	Jan. 15, 2007 USD ($)	Dec. 31, 2006 USD ($)	Jun. 30, 2010 Hedge of Bucyrus Stock Price USD ($)	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member] USD ($)	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 1 [Member] USD ($)	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member] USD ($)
Derivative contracts entered to mitigate risk
Bucyrus stock, percentage of risk mitigated by derivative contracts (as a percent)									95.00%
Notional Amount of Foreign Currency Derivative Purchase Contracts					€ 450.0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.6		0.6			0						0.6
Payments for (Proceeds from) Derivative Instrument, Investing Activities			0	21.1					21.1
Number of types of derivatives	2		2
Variable interest rate			The interest rate swap agreement is based on LIBOR yield curves at the reporting date
Notional amount of interest rate swap agreement	400.0		400.0					200.0
Amount paid to exit interest rate swap agreement							5.4
Notional amount of foreign currency contingent participating derivatives	580.2		580.2
Foreign Currency Cash Flow Hedge Derivative at Fair Value, Net										3.8	3.3
Notional amount of foreign currency derivatives classified under cash flow hedge	523.5		523.5
Unrealized gain on fair value of currency exchange forward cash flow hedge contracts			3.3
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			2.6
Fair value of asset derivatives designated as hedging instruments
Foreign exchange contracts	10.2		10.2			2.9
Interest rate contract	39.3		39.3			39.3						39.3	39.3
Total asset derivatives	49.5		49.5			42.2
Fair value of liability derivatives designated as hedging instruments
Foreign exchange contracts	6.4		6.4			6.0
Interest rate contract	39.3		39.3			38.1
Total liability derivatives	45.7		45.7			44.1
Total Derivatives	3.8		3.8			(1.9)
Fair value of asset derivatives not designated as hedging instruments
Option derivative contracts	0		0			0.3
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.6		0.6			0						0.6
Gain Recognized on Derivatives in Income:
Interest rate contract	4.9	4.8	9.8	9.7
Gain (Loss) Recognized on Derivatives in OCI:
Foreign exchange contracts	1.3	(1.6)	4.7	3.3
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Gain (loss) reclassified from Accumulated OCI into cost of goods sold	(1.8)	0.5	(3.4)	(1.7)
Gain (loss) reclassified from Accumulated OCI into other income (expense) - net	1.0	(2.6)	1.0	(2.3)
Total gain (loss) reclassified from Accumulated OCI into Income (Effective)	(0.8)	(2.1)	(2.4)	(4.0)
Gain (Loss) Recognized on Derivatives (Ineffective) in Income:
Gain (loss) on derivatives recognized in other income (expense) - net	0	1.2	0.5	(0.9)
Loss Recognized on Derivatives not designated as hedges in Income:
Loss on derivatives not designated as hedges recognized in other income (expense) - net	(0.6)	12.0	(0.9)	4.5
Unrealized net gains (losses) included in Accumulated other comprehensive income
Balance at beginning of period	1.3	1.1	(2.1)	(3.6)
Additional (losses) gains	2.3	(4.3)	5.7	0.7
Amounts reclassified to earnings	(1.0)	2.6	(1.0)	2.3
Balance at end of period	$ 2.6	$ (0.6)	$ 2.6	$ (0.6)