Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity (Changes In The Components Of Accumulated Other Comprehensive Income (Loss)) (Detail)

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Shareholders' Equity (Changes In The Components Of Accumulated Other Comprehensive Income (Loss)) (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Postretirement Benefit Liability [Member]
Sep. 30, 2011
Postretirement Benefit Liability [Member]
Sep. 30, 2012
Accumulated Net Unrealized Investment Gain (Loss) On Securities [Member]
Sep. 30, 2011
Accumulated Net Unrealized Investment Gain (Loss) On Securities [Member]
Sep. 30, 2012
Accumulated Translation Adjustment [Member]
Sep. 30, 2011
Accumulated Translation Adjustment [Member]
Sep. 30, 2012
Foreign Currency Translation Adjustment [Member]
Dec. 31, 2011
Foreign Currency Translation Adjustment [Member]
Sep. 30, 2011
Foreign Currency Translation Adjustment [Member]
Dec. 31, 2010
Foreign Currency Translation Adjustment [Member]
Sep. 30, 2012
Unrealized Gain (Loss) On Derivatives [Member]
Sep. 30, 2011
Unrealized Gain (Loss) On Derivatives [Member]
Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Member]
Sep. 30, 2011
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in Accumulated Other Comprehensive Loss [Roll Forward]                                    
Balance     $ (92.6)   $ (408.9) $ (305.1) $ 2.6 $ 33.6     $ 324.7 $ 312.5 $ 239.9 $ 314.7 $ 1.2 $ 2.7 $ (92.6) $ 45.9
Change 40.3 (155.6) 46.1 (104.7) 16.4 13.9                     41.6 (105.2)
Unrealized net gain (loss) on derivative financial instruments 14.2 (16.7) 13.6 (13.5)                     13.6 (13.5)    
Unrealized net gain (loss) on foreign currency translation 18.6 (132.2) 12.2 (74.8)         12.2 (74.8)                
Unrealized net loss on marketable securities (0.1) (11.6) (0.6) (30.8)     (0.6) (30.8)                    
Balance $ (51.0)   $ (51.0)   $ (392.5) $ (291.2) $ 2.0 $ 2.8     $ 324.7 $ 312.5 $ 239.9 $ 314.7 $ 14.8 $ (10.8) $ (51.0) $ (59.3)