Quarterly report pursuant to Section 13 or 15(d)

Recent Accounting Pronouncements - Contract Balances (Details)

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Recent Accounting Pronouncements - Contract Balances (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Recent Accounting Pronouncements    
Accounts Receivable $ 269 $ 230
Contract assets 12  
Total 281 $ 230
Contract with customer revenue recognized $ 41