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Commitments and Contingent Liabilities, Operating Leases (Details)
$ in Millions
Sep. 30, 2021
USD ($)
Operating Leases [Abstract]  
ROU asset carrying value $ 352.9 [1]
Lease liability carrying value 379.1 [2]
Lease liability, current 35.5
Lease liability, noncurrent 343.6
Storage and Pipeline Facilities [Member]  
Operating Leases [Abstract]  
ROU asset carrying value 164.0 [1]
Lease liability carrying value $ 164.5 [2]
Weighted-average remaining term 12 years
Weighted-average discount rate 3.60% [3]
Transportation Equipment [Member]  
Operating Leases [Abstract]  
ROU asset carrying value $ 22.6 [1]
Lease liability carrying value $ 24.4 [2]
Weighted-average remaining term 2 years
Weighted-average discount rate 2.60% [3]
Office and Warehouse Space [Member]  
Operating Leases [Abstract]  
ROU asset carrying value $ 166.3 [1]
Lease liability carrying value $ 190.2 [2]
Weighted-average remaining term 15 years
Weighted-average discount rate 3.20% [3]
[1] Right-of-use (“ROU”) asset amounts are a component of “Other assets” on our Unaudited Condensed Consolidated Balance Sheet.
[2] At September 30, 2021, lease liabilities of $35.5 million and $343.6 million were included within “Other current liabilities” and “Other long-term liabilities,” respectively.
[3] The discount rate for each category of assets represents the weighted average of either (i) the implicit rate applicable to the underlying leases (where determinable) or (ii) our incremental borrowing rate adjusted for collateralization (if the implicit rate is not determinable).  In general, the discount rates are based on either information available at the lease commencement date or January 1, 2019 for leases existing at the adoption date for ASC 842, Leases.