Investments in Equity Securities (Investment in ABI Narrative) (Details) - ABI [Member] - USD ($) shares in Millions |
6 Months Ended | 12 Months Ended |
---|---|---|
Jun. 30, 2021 |
Dec. 31, 2020 |
|
Schedule of Equity Method Investments [Line Items] | ||
Equity method investment, ownership percentage | 10.00% | |
Number of restricted shares owned (in shares) | 185 | |
Number of ordinary shares owned (in shares) | 12 | |
Restricted shares, lock-up period | 5 years | |
Investments in equity securities | $ 17,185,000,000 | $ 16,651,000,000 |
Difference between carrying amount and fair value, percentage (approximately) | 17.00% | 17.00% |
Equity method investment, impairment | $ 0 | $ 0 |
Fair Value, Inputs, Level 1 [Member] | ||
Schedule of Equity Method Investments [Line Items] | ||
Fair value of equity investment | $ 14,200,000,000 | $ 13,800,000,000 |