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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2018
Commitments and Contingencies.  
Changes to Gross Insurance Liabilities

The changes to our insurance reserves for the years ended December 31 are summarized below (in millions):

 

 

 

 

 

 

 

 

    

2018(a)

    

2017

Balance as of January 1

 

$

582

 

$

588

Self-insurance expense

 

 

142

 

 

142

Cash paid and other

 

 

(157)

 

 

(148)

Balance as of December 31

 

$

567

 

$

582

Current portion as of December 31

 

$

137

 

$

107

Long-term portion as of December 31

 

$

430

 

$

475

(a)

Based on current estimates, we anticipate that most of our insurance reserves will be settled in cash over the next six years.