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Statements Of Consolidated Cash Flows (Supplemental Disclosures of Cash Flow Information) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Supplemental Cash Flow [Abstract]    
Capital expenditures included in current liabilities $ 150.5 $ 123.7
Dividends declared but not paid 99.8 94.0
Assets recorded for asset retirement obligations $ 69.8 $ 4.8