Investments in Equity Securities (Summary of Financial Data in ABI) (Details) - ABI [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Net revenues	$ 54,187	$ 55,500	$ 56,004
Gross profit	33,735	34,986	34,376
Earnings from continuing operations	10,530	9,020	6,769
Net earnings	10,530	9,020	6,845
Net earnings attributable to ABI	$ 9,189	$ 7,641	$ 5,473
Current assets				$ 27,353	$ 20,289
Long-term assets				199,591	207,921
Current liabilities				36,819	32,019
Long-term liabilities				119,025	130,812
Noncontrolling interests				$ 8,765	$ 7,251