XML 75 R56.htm IDEA: XBRL DOCUMENT
v3.10.0.1

History, Organization and Business Combination - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Feb. 06, 2019 | Sep. 20, 2016 | Mar. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Business acquisition, share price |  |  | $ 42.75 |  |
5.950% Preference Shares |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  | 5.95% | 5.95%
5.950% Preference Shares | Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage | 5.95% |  |  |  |
5.625% Preference Shares |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 5.625% |  | 5.625% | 5.625%
5.625% Preference Shares | Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage | 5.625% |  |  |  |
Maximum | Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Loss from Catastrophes |  |  | $ 350 |  |

X
- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The charge against earnings in the period for the uninsured portion of a loss from a fire, explosion, or natural disaster (hurricane, earthquake). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
Name: | us-gaap_LossFromCatastrophes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage rate used to calculate dividend payments on preferred stock. + References No definition available. + Details
Name: | us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesDPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesEPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |