XML 47 R35.htm IDEA: XBRL DOCUMENT v3.20.2
Schedule of Change in Asset Retirement Obligations (Tables)
6 Months Ended
Jun. 30, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Change in Asset Retirement Obligation [Table Text Block]
A reconciliation of our AROs is as follows:
(in millions)June 30, 2020December 31, 2019
AROs, beginning of period$1,315.2  $1,160.1  
Liabilities incurred6.4  15.8  
Liabilities settled(52.6) (112.8) 
Accretion expense34.0  62.4  
Revisions in estimated cash flows51.3  191.0  
Foreign currency translation(57.9) (1.3) 
AROs, end of period1,296.4  1,315.2  
Less current portion(155.9) (154.4) 
Non-current portion of AROs$1,140.5  $1,160.8