Accumulated Other Comprehensive Income (Parentheticals) (Details)
$ in Millions
|3 Months Ended|
Mar. 31, 2019
|Statement of Comprehensive Income [Abstract]|
|Amount of gain expected to be reclassified into earnings||$ 16.7|
The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.
Reference 1: http://www.xbrl.org/2003/role/disclosureRef