Annual report pursuant to Section 13 and 15(d)

Schedule I - Condensed Financial Information of Registrant - Condensed Balance Sheet (Details)

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Schedule I - Condensed Financial Information of Registrant - Condensed Balance Sheet (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Condensed Balance Sheet Statements, Captions [Line Items]    
Cash and cash equivalents $ 722 $ 876
Non-current restricted cash 11 91
Property, plant and equipment, net 23,978 20,635
Debt issuance and deferred financing costs, net 149 277
Investments in affiliates 64 10
Total assets 27,906 23,703
Current liabilities 1,251 1,077
Long-term debt, net 25,336 21,688
Stockholders’ deficit (1,764) (1,396)
Total liabilities and equity 27,906 23,703
Parent Company [Member]    
Condensed Balance Sheet Statements, Captions [Line Items]    
Cash and cash equivalents 0 0
Non-current restricted cash 0 7
Property, plant and equipment, net 15 15
Debt issuance and deferred financing costs, net 12 0
Investments in affiliates (435) (145)
Total assets (408) (123)
Current liabilities 8 8
Long-term debt, net 1,348 1,265
Stockholders’ deficit (1,764) (1,396)
Total liabilities and equity $ (408) $ (123)