XML 132 R118.htm IDEA: XBRL DOCUMENT v3.10.0.1
Benefit Plans (Schedule of amounts recognized in Other comprehensive income) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Retirement Benefits [Abstract]      
Amounts arising during the period $ (41) $ (31) $ (29)
Settlement 6 9 (2)
Reclassification adjustment relating to prior service credit (2) (2) (2)
Reclassification adjustment relating to actuarial loss 36 35 37
Total increase (decrease) in Other comprehensive income $ (1) $ 11 $ 4