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Debt (Tables)
3 Months Ended
Mar. 31, 2019
Debt Disclosure [Abstract]  
Debt

Debt consists of (in millions):

 

 

March 31,

 

 

December 31,

 

 

 

2019

 

 

2018

 

$1.4 billion in Senior Notes, interest at 2.60% payable

   semiannually, principal due on December 1, 2022

 

$

1,395

 

 

$

1,394

 

$1.1 billion in Senior Notes, interest at 3.95% payable

   semiannually, principal due on December 1, 2042

 

 

1,088

 

 

 

1,088

 

Total

 

$

2,483

 

 

$

2,482