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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)
In Millions, unless otherwise specified
Total
Common Shares ($1 par value) [Member]
Paid-In Capital [Member]
Retained (Deficit) Earnings [Member]
Accumulated Other Comprehensive Income [Member]
Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2011 $ 742 $ 348 $ 65 $ 38 $ 76 $ 215
Total comprehensive income 78     33 27 18
Shares issued   2 (2)      
Shares retired:            
Repurchased (8) (1) (7)      
Surrendered (non-cash) (7)   (7)      
Cash dividends declared (26)     (26)    
Stock-based compensation 13   13      
Ending balance at Mar. 31, 2012 792 349 62 45 103 233
Beginning balance at Dec. 31, 2012 534 349 16 (102) 59 212
Total comprehensive income 25     47 (23) 1
Shares issued (7) 2 (9)      
Shares retired:            
Repurchased (35) (2) (11) (22)    
Surrendered (non-cash) (10)   (10)      
Cash dividends declared (26)     (26)    
Stock-based compensation 14   14      
Ending balance at Mar. 31, 2013 $ 495 $ 349   $ (103) $ 36 $ 213