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Financing Arrangements - Additional Information (Detail)
3 Months Ended
Jun. 30, 2019
USD ($)
Dec. 31, 2019
EUR (€)
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
May 31, 2019
EUR (€)
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]            
Repayments of outstanding commercial paper and other short-term borrowings | $ $ 795,000,000          
Commercial paper | $       $ 0   $ 0
Domestic Line of Credit | Subsequent Event            
Debt Instrument [Line Items]            
Line of Credit Facility, Current Borrowing Capacity | $     $ 2,000,000,000.0      
Foreign Line of Credit | Subsequent Event            
Debt Instrument [Line Items]            
Line of Credit Facility, Current Borrowing Capacity | €   € 200,000,000        
Long-term Line of Credit | $     $ 224,000,000      
Line of Credit Facility, Interest Rate at Period End   0.91% 0.91%      
0.4% Senior Notes Due in May 2024            
Debt Instrument [Line Items]            
Senior notes | €         € 750,000,000  
0.4% Senior Notes Due in May 2024 | Senior Notes            
Debt Instrument [Line Items]            
Senior notes | €         € 750,000,000  
Senior notes, interest rate         0.40%  
1.3% Senior Notes Due in May 2029            
Debt Instrument [Line Items]            
Senior notes | €         € 750,000,000  
Senior notes, interest rate         1.30%