XML 73 R56.htm IDEA: XBRL DOCUMENT v3.22.0.1
Investments in Equity Securities (Investment in ABI Narrative) (Details) - USD ($)
shares in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Oct. 10, 2021
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Investments [Line Items]          
Fair value of investment $ 11,200,000,000   $ 11,200,000,000    
ABI [Member]          
Investments [Line Items]          
Equity method investment, ownership percentage (approximately)       10.00%  
Equity method investment, number of shares owned, restricted (in shares)       185  
Equity method investment, number of shares owned, common (in shares)       12  
Restricted shares, lock-up period   5 years      
Equity method investments       $ 11,144,000,000 $ 16,651,000,000
Equity method investment, difference between carrying amount and fair value, percentage     35.00% 7.00% 17.00%
Equity method investment, impairment $ 6,200,000,000       $ 0
Equity method investment, reduction In share price, percentage 18.00%   18.00%    
Difference between carrying amount and underlying equity       $ 5,100,000,000  
Level 1 [Member] | ABI [Member]          
Investments [Line Items]          
Fair value of investment       $ 11,900,000,000 $ 13,800,000,000