XML 160 R139.htm IDEA: XBRL DOCUMENT v3.20.4
Leases Narrative (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Leases [Abstract]  
FinanceLeaseLeaseNotyetCommencedLiabilities $ 33
Lessee, Finance Lease, Lease Not yet Commenced, Term of Contract 10 years