Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Parentheticals) (Details)

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Accumulated Other Comprehensive Income (Parentheticals) (Details)
$ in Millions
9 Months Ended
Sep. 30, 2018
USD ($)
Statement Of Income And Comprehensive Income [Abstract]  
Amount expected to be reclassified into earnings $ 55.0