XML 108 R93.htm IDEA: XBRL DOCUMENT v3.10.0.1
Schedule II Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
AR Amounts (credited) charged to other income statement accounts $ 0 $ 0 $ 0
Tax Valuation Allowances and Reserves Beginning Balance 35 24 38
Tax Valuation Allowances and Reserves, Period Increase (Decrease) 9 11 0
Tax Valuation Allowances and Reserves, Deductions 0 0 14
Tax Valuation Allowances and Reserves Ending Balance 44 35 24
Accounts Receivable [Member]      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
AR Valuation and Qualifying Accounts Beginning Balance 2 7 6
AR Additions charged to bad debt provision 0 (1) 4
AR Amounts (credited) charged to other income statement accounts 0 0 0
AR Deductions and other, net of recoveries (1) (4) (3)
AR Valuation and Qualifying Accounts Ending Balance $ 1 $ 2 $ 7