Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Narrative) (Details)

v3.21.2
Commitments And Contingencies (Narrative) (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Commitments And Contingencies [Line Items]    
Estimated Litigation Liability $ 16 $ 13
Maximum [Member] | Pending Litigation    
Commitments And Contingencies [Line Items]    
Loss Contingency, Range of Possible Loss, Portion Not Accrued 36  
Maximum [Member] | Unasserted Claim [Member]    
Commitments And Contingencies [Line Items]    
Loss Contingency, Range of Possible Loss, Portion Not Accrued $ 1