XML 112 R96.htm IDEA: XBRL DOCUMENT v3.10.0.1
Regulatory Matters, Commitments, Contingencies And Environmental Liabilities Regulatory Matters, Commitments, Contingincies and Enviironmental (Schedule of Rental Expense) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]      
Operating Leases, Rent Expense, Contingent Rentals $ 4 $ 16 $ 18
Rental expense(1) [1] 139 171 161
Sublease rental income(2) [2] 40 25 26
Net $ 99 $ 146 $ 135
[1] Includes contingent rentals totaling $4 million, $16 million and $18 million for the years ended December 31, 2018, 2017 and 2016, respectively.
[2] Sublease rental income is included in other revenues in the accompanying statements of operations.