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Segment Information (Revenue by Geographic Segment) (Details) (USD $)
In Millions
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Revenues, total $ 937.2 $ 1,037.0 [1] $ 1,848.4 $ 2,014.4 [1]
United States [Member]
       
Revenues 363.2 450.2 724.2 880.8
United Kingdom [Member]
       
Revenues 99.1 113.7 198.9 211.6
Other International [Member]
       
Revenues $ 474.9 $ 473.1 $ 925.3 $ 922.0
[1] Reclassified for discontinued operations. See note (a).