XML 31 R8.htm IDEA: XBRL DOCUMENT v3.20.2
Statements Of Consolidated Cash Flows (Supplemental Disclosures of Cash Flow Information) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Supplemental Cash Flow [Abstract]    
Capital expenditures included in current liabilities $ 159.6 $ 187.1
Dividends declared but not paid 99.9 94.1
Assets recorded for asset retirement obligations $ 70.3 $ 12.8