Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Summary of Signficant Accounting Policies Equity Method Investments (Details) $ in Thousands, kr in Millions		3 Months Ended				12 Months Ended
	Dec. 01, 2016 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2018 SEK (kr)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Other than Temporary Impairment						$ 41,057	$ 70,895	$ 0
Payments to Acquire Equity Method Investments						7,594	60,300	7,664
Equity in (losses) earnings of unconsolidated subsidiaries						32,277	64,471	(5,907)
Mekonomen [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Other than Temporary Impairment		$ 40,000	$ 48,000	$ 23,000		40,000	$ 71,000
Payments to Acquire Equity Method Investments	$ 181,000		$ 48,000
Equity Method Investment, Ownership Percentage	26.50%
Proceeds from Equity Method Investment, Distribution				$ 8,000	kr 67
Mekonomen [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage			26.60%				26.60%
Europe [Member]
Schedule of Equity Method Investments [Line Items]
Equity in (losses) earnings of unconsolidated subsidiaries						33,000	$ 65,000	$ 6,000
North America [Member]
Schedule of Equity Method Investments [Line Items]
Equity in (losses) earnings of unconsolidated subsidiaries						$ 1,000