XML 133 R65.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Investments in Equity Securities (Investment in Cronos Narrative) (Details) - Cronos [Member]
$ / shares in Units, shares in Millions, $ in Millions, $ in Billions
12 Months Ended
Mar. 31, 2019
USD ($)
Mar. 31, 2019
CAD ($)
$ / shares
shares
Mar. 07, 2019
CAD ($)
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2019
CAD ($)
Sep. 30, 2019
director
board_member
Dec. 31, 2018
USD ($)
Investments [Line Items]              
Equity method investment, number of shares owned, common (in shares) | shares   149.8          
Equity method investment, ownership percentage (approximately)   45.00%   45.00%      
Payments to acquire equity method investments and derivative instruments, investing $ 1,800 $ 2.4 $ 2.4        
Equity method investment, warrant exercised, ownership percentage 55.00% 55.00%          
Payments to acquire equity method investments $ 400            
Payments for deferred tax liability 300            
Number of directors nominated | director           4  
Number of independent directors nominated | director           1  
Number of members on the board of directors | board_member           7  
Difference between carrying amount and underlying equity       $ 200      
Equity method investments       $ 1,305     $ 0
Equity Contract, Preemptive Rights [Member]              
Investments [Line Items]              
Equity method investment, price per share if exercised | $ / shares   $ 16.25          
Equity method investment, number of shares eligible for purchase | shares       37.0      
Equity method investment, total exercise price       $ 500 $ 0.6    
Payments for derivative instrument, investing activities 500            
Equity Contract, Warrant [Member]              
Investments [Line Items]              
Equity method investment, price per share if exercised | $ / shares   $ 19.00          
Equity method investment, number of shares eligible for purchase | shares       78.0      
Equity method investment, percentage of shares eligible for purchase   10.00%          
Equity method investment, total exercise price       $ 1,100 $ 1.5    
Payments for derivative instrument, investing activities $ 1,200            
Common Stock [Member]              
Investments [Line Items]              
Equity method investments       1,002      
Level 1 [Member]              
Investments [Line Items]              
Fair value of investment       $ 1,200