Revenues from Contracts with Customers Schedule of Revenue by Major Customers, by Reporting Segments (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Major Customer [Line Items]
Revenues from external customers	$ 4,344,204,000	$ 4,770,799,000	$ 4,471,236,000	$ 4,128,427,000	$ 3,992,705,000	$ 3,719,247,000	$ 3,458,864,000	$ 3,080,483,000	$ 17,714,666,000	$ 14,251,299,000	$ 10,535,700,000
Concentration Risk, Percentage									79.00%
CANADA
Revenue, Major Customer [Line Items]
Revenues from external customers									$ 732,321,000	673,842,000	0
Asphalt, Fuel, Oil And Other Products [Member]
Revenue, Major Customer [Line Items]
Revenues from external customers									985,234,000	743,394,000	422,644,000
Refining Segment
Revenue, Major Customer [Line Items]
Revenues from external customers									15,806,304,000	12,579,672,000	10,002,831,000
Refining Segment | Asphalt, Fuel, Oil And Other Products [Member]
Revenue, Major Customer [Line Items]
Revenues from external customers									822,587,000	565,200,000	422,644,000
Other Segments [Member] | Asphalt, Fuel, Oil And Other Products [Member]
Revenue, Major Customer [Line Items]
Revenues from external customers									$ 162,647,000	$ 178,194,000	$ 0