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Long-Term Debt And Borrowing Arrangements (Narrative) (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Document Period End Date Mar. 31, 2019  
Other Long-term Debt $ 36 $ 41
Uncommitted Credit Facility [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Interest Rate During Period 0.73%  
Uncommitted Credit Facility [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Interest Rate During Period 1.53%  
Four and One over Two Euro-Denominated Senior Notes [Member] | Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Maturity Date, Description May 2025  
Long-term Debt, Gross $ 280 287
Six And Three Over Eight Senior Notes [Member] | Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Maturity Date, Description April 2024  
Long-term Debt, Gross $ 350 350
Five And One Over Two Senior Notes [Member] | Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Maturity Date, Description April 2023  
Long-term Debt, Gross $ 675 675
Four and One over Eight Euro-Denominated Senior Notes [Member] | Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Maturity Date, Description November 2024  
Long-term Debt, Gross $ 337 $ 344