Annual report pursuant to Section 13 and 15(d)

Assets and Liabilities Measured at Fair Value (Details)

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Assets and Liabilities Measured at Fair Value (Details) (Recurring, USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Current assets:    
Cash equivalents $ 342 $ 424
Interest rate swap arrangements (note 6)   1
Current liabilities:    
Interest rate swap arrangements (note 6)   13
Long-term liabilities:    
Debt (note 6) 3,783 3,626
Level 1
   
Current assets:    
Cash equivalents 342 424
Level 2
   
Current assets:    
Interest rate swap arrangements (note 6)   1
Current liabilities:    
Interest rate swap arrangements (note 6)   13
Long-term liabilities:    
Debt (note 6) $ 3,783 $ 3,626