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Shareholders' Equity - Preferred shares (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |  | 1 Months Ended | 4 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 01, 2018 | Sep. 30, 2021 | Jun. 30, 2021 | Nov. 30, 2017 | Aug. 31, 2017 | Nov. 30, 2017 | Dec. 31, 2022 | Jun. 30, 2022
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred shares, par value per share |  |  |  |  |  |  | $ 0.01 |
Series C Preferred Shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred shares, dividend rate (as a percent) | 6.75% |  |  |  |  |  |  |
Series E preferred shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred shares, dividend rate (as a percent) |  | 5.25% |  |  |  |  |  |
Preferred shares, redemption price per share |  | $ 25 |  |  |  |  |  |
Series F Preferred Shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred shares issued |  |  |  | $ 100 | $ 230 | $ 330 |  |
Preferred shares, dividend rate (as a percent) |  |  |  |  |  | 5.45% |  |
Preferred shares, par value per share |  |  |  | $ 0.01 |  | $ 0.01 |  |
Liquidation preference per share |  |  |  | 25,000 |  | 25,000 |  |
Preferred shares, redemption price per share |  |  |  | $ 25,000 |  | $ 25,000 |  |
Series F depositary share equivalent |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preference shares, number of shares issued |  |  |  | 13.2 |  | 13.2 |  |
Proportionate interest of preference shares, per depositary share |  |  |  | 0.10% |  | 0.10% |  |
Liquidation preference per share |  |  |  | $ 25 |  | $ 25 |  |
Preferred shares, redemption price per share |  |  |  | $ 25 |  | $ 25 |  |
Series G Preferred Stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred shares issued |  |  | $ 500 |  |  |  |  |
Preferred shares, dividend rate (as a percent) |  |  | 4.55% |  |  |  |  |
Preferred shares, par value per share |  |  | $ 0.01 |  |  |  |  |
Liquidation preference per share |  |  | 25,000 |  |  |  |  |
Preferred shares, redemption price per share |  |  | $ 25,000 |  |  |  |  |
Series G depositary share equivalent |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preference shares, number of shares issued |  |  | 20.0 |  |  |  |  |
Proportionate interest of preference shares, per depositary share |  |  |  |  |  |  |  | 0.10%
Liquidation preference per share |  |  | $ 25 |  |  |  |  |
Preferred shares, redemption price per share |  |  | $ 25 |  |  |  |  |

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- Definition The percentage rate used to calculate dividend payments on preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21484-112644 + Details
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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21488-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21564-112644 + Details
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644 + Details
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