XML 542 R47.htm IDEA: XBRL DOCUMENT v3.22.0.1
Summary of Significant Accounting Policies Measurement of Impairment of Long-Lived Assets (Details)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]  
Asset impairment charges $ 161.6