Basis of Presentation - Special Dividend (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
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Nov. 20, 2020 |
Sep. 14, 2020 |
Dec. 31, 2020 |
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| Basic of presentation | Ìý | Ìý | Ìý |
| Proceeds from sale of an alternative energy investment | Ìý | Ìý | $ 272 |
| Gain on sale of alternative energy investment | Ìý | Ìý | $ 224 |
| Common Class A and B | Ìý | Ìý | Ìý |
| Basic of presentation | Ìý | Ìý | Ìý |
| Dividend per share, cash paid | $ 1.50 | $ 1.50 | Ìý |
| Dividends paid to common shareholders | $ 625 | $ 626 | Ìý |
| 8.0% Series A Cumulative Redeemable Preferred Stock | Ìý | Ìý | Ìý |
| Basic of presentation | Ìý | Ìý | Ìý |
| Preferred shares issued per common share outstanding | Ìý | 0.03 | Ìý |
| Preferred Stock, Dividend Rate, Percentage | Ìý | 8.00% | Ìý |
| Preferred stock par value | Ìý | $ 0.01 | Ìý |
| Liquidation preference per share | Ìý | 100 | Ìý |
| Distribution ratio for the preferred share dividend | Ìý | $ 3.00 | Ìý |
| Liquidation preference | Ìý | $ 1,300 | Ìý |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Aggregate preferred shares issued during the period for each share of common stock outstanding. No definition available.
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- Definition The per share distribution ratio for the preferred share dividend. No definition available.
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- Definition The aggregate liquidation preference of stock that is subject to mandatory redemption settlement terms. No definition available.
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- Definition The per share liquidation preference of stock subject to mandatory redemption settlement terms. No definition available.
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- Definition Carrying amount for the par value of shares that are subject to mandatory redemption settlement terms. No definition available.
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of gain (loss) included in earnings for investments classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The percentage rate used to calculate dividend payments on preferred stock. No definition available.
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- Definition The cash inflow associated with the sale and maturity (principal being due) of other investments, prepayment and call (request of early payment) of other investments not otherwise defined in the taxonomy. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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