Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Current Assets
Allowance for Doubtful Accounts Receivable	$ 0	$ 0
Other Assets
Other Intangible Assets (accumulated amortization)	$ 82	$ 78
Stockholders' Equity
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000	1,000
Common Stock, Shares, Issued	935.51	935.51