v3.10.0.1
Commitments And Contingencies (Tables)
 9 Months Ended
Sep. 30, 2018
Commitments And Contingencies [Abstract]  
Commitments And Contingencies Activity

Our personal injury liability activity was as follows:







 

 

 

 



 

 

 

 

 Millions,

 

 

 

 

 for the Six Months Ended June 30,

 2018  2017 

 Beginning balance

$

 285 

$

 290 

 Current year accruals

 

 35 

 

 38 

 Changes in estimates for prior years

 

 (17)

 

 (3)

 Payments

 

 (34)

 

 (40)

 Ending balance at June 30

$

 269 

$

 285 

 Current portion, ending balance at June 30

$

 68 

$

 69 

 



Our environmental liability activity was as follows:



 

 

 

 



 

 

 

 

 Millions,

 

 

 

 

 for the Six Months Ended June 30,

 2018  2017 

 Beginning balance

$

 196 

$

 212 

 Accruals

 

 36 

 

 18 

 Payments

 

 (26)

 

 (26)

 Ending balance at June 30

$

 206 

$

 204 

 Current portion, ending balance at June 30

$

 59 

$

 56