Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	$ (99.3)	$ (53.3)
Unrealized holding gain on securities	2.3	2.4
Gain arising during period	13.4
Reclassification to net earnings	8.4	5.8
Effect of exchange rate changes and deferred taxes	37.3	(22.3)
Balance at the end of the period	(37.9)	(67.4)
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	47.4	(19.9)
Balance at the end of the period	62.8	2.5
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	2.3	2.4
Reclassification to net earnings	(0.3)	(0.2)
Effect of exchange rate changes and deferred taxes	(0.5)	(0.8)
Balance at the end of the period	(1.5)	(3.5)
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	(111.7)	(70.8)
Gain arising during period	13.4
Reclassification to net earnings	8.7	6.0
Effect of exchange rate changes and deferred taxes	(9.6)	(1.6)
Balance at the end of the period	$ (99.2)	$ (66.4)