XML 186 R158.htm IDEA: XBRL DOCUMENT v3.8.0.1
Leases (Schedule of Future Minimum Rental Payments for Operating Leases) (Details)
$ in Millions
Dec. 31, 2017
USD ($)
Leases [Abstract]  
2018 $ 54
2019 47
2020 37
2021 28
2022 22
Later years 155
Sublease income 0
Minimum lease commitments $ 343