XML 82 R78.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Credit Facilities (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
Line of Credit Facility [Abstract]  
Line of Credit Facility, Maximum Borrowing Capacity $ 500
Line of Credit Facitlity, Covenant Terms, One Month Term 1 year
Line of Credit Facitlity, Covenant Terms, Two Month Term 2 years
Line of Credit Facitlity, Covenant Terms, Three Month Term 3 years
Line of Credit Facitlity, Covenant Terms, Six Month Term 6 months
Debt Instrument, Covenant Description 65.00%
Ratio of Indebtedness to Net Capital 0.519
Commercial Paper, Maximum Term 270 days
Commercial Paper $ 0
FERC Authorized Short-term Debt, effective through February 6, 2014 900
Line of Credit Facility, Amount Outstanding 0
Line of Credit Facility, Remaining Borrowing Capacity 500
letter of credit facility 220
Letters of Credit Outstanding, Amount $ 55