XML 54 R44.htm IDEA: XBRL DOCUMENT v3.21.2
Retirement Plans (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Net Periodic Pension And OPEB Cost [Abstract]        
Changes in fair value     5 years  
Other comprehensive income defined benefit plans $ (24,000,000) $ (18,000,000) $ (73,000,000) $ (58,000,000)
Defined Benefit Plans [Member]        
Net Periodic Pension And OPEB Cost [Abstract]        
Service cost 25,000,000 19,000,000 85,000,000 72,000,000
Interest cost 25,000,000 33,000,000 78,000,000 102,000,000
Expected return on plan assets (67,000,000) (71,000,000) (202,000,000) (211,000,000)
Amortization of actuarial loss 35,000,000 27,000,000 106,000,000 79,000,000
Net periodic cost 18,000,000 8,000,000 67,000,000 42,000,000
Voluntary cash contributions to qualified pension plan     0  
OPEB [Member]        
Net Periodic Pension And OPEB Cost [Abstract]        
Service cost     1,000,000 1,000,000
Interest cost   1,000,000 2,000,000 4,000,000
Amortization of prior service cost (3,000,000) (3,000,000) (10,000,000) (10,000,000)
Amortization of actuarial loss 2,000,000 1,000,000 5,000,000 $ 5,000,000
Net periodic cost $ (1,000,000) $ (1,000,000) $ (2,000,000)