Investments, Loans and Long-Term Receivables (CF United LLC) (Details) - CF United LLC $ in Millions	Jun. 30, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Voting interest acquired	50.00%
Economic interest acquired	48.00%
Equity investments	$ 322

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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