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Investments in Equity Securities (Summary of Financial Data in Cronos) (Details) - Cronos Group Inc. [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]
Net revenues	$ 21
Gross profit	10
Net earnings	$ 1,117
Current assets		$ 1,575
Long-term assets		511
Current liabilities		457
Long-term liabilities		7
Noncontrolling interests		$ 0

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