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Long-Term Debt and Credit Facilities (Tables)
12 Months Ended
Dec. 31, 2018
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
Long-term debt consisted of the following at December 31:
  
 
Weighted Average Interest Rate
 
Maturities
 
2018
 
2017
Notes
 
2.8%
 
2019
-
2078
 
$
5,820

 
$
6,542

Commercial paper
 
2.5%
 
2019
 
534

 
24

 
 
 
 
 
 
 
 
6,354

 
6,566

Less: Current portion of long-term debt
 
 
 
 
 
 
 

 

Total
 
 
 
 
 
 
 
$
6,354

 
$
6,566

Schedule of Maturities of Long-term Debt
Excluding such obligations, scheduled maturities of long-term debt and capitalized leases outstanding as of December 31, 2018, were as follows:  
Years Ended December 31,
2019
$

2020
249

2021
298

2022
886

2023
893

Thereafter
2,422