XML 86 R81.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Debt and Credit Arrangements - Letters of Credit (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
Restricted cash and restricted cash equivalents $ 1.0 $ 1.0
Restricted cash and cash equivalents, non-current $ 1.0 $ 1.0