Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	$ (99.3)	$ (53.3)
Unrealized holding gain on securities	1.1	2.0
Reclassification to net earnings	3.2	1.8
Effect of exchange rate changes and deferred taxes	23.0	22.7
Balance at the end of the period	(72.0)	(26.8)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	15.4	22.4
Effect of exchange rate changes and deferred taxes	25.6	24.5
Balance at the end of the period	41.0	46.9
Unrealized Gain (Loss) on Securities
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	(3.0)	(4.9)
Unrealized holding gain on securities	1.1	2.0
Reclassification to net earnings		(0.1)
Effect of exchange rate changes and deferred taxes	(0.4)	(0.7)
Balance at the end of the period	(2.3)	(3.7)
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	(111.7)	(70.8)
Reclassification to net earnings	3.2	1.9
Effect of exchange rate changes and deferred taxes	(2.2)	(1.1)
Balance at the end of the period	$ (110.7)	$ (70.0)