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Supplemental Guarantor Information - Condensed Consolidating Statements of Cash Flows (Details)

v3.8.0.1
Supplemental Guarantor Information - Condensed Consolidating Statements of Cash Flows (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Condensed Cash Flow Statements, Captions [Line Items]      
Cash flows provided by (used in) operating activities $ 977 $ 0 $ (171)
Cash flows from investing activities      
Property, plant and equipment, net (1,290) (2,315) (2,913)
Investments in subsidiaries 0 0 0
Distributions received from affiliates, net 0 0 0
Other 0 (38) (62)
Net cash provided by (used in) investing activities (1,290) (2,353) (2,975)
Cash flows from financing activities      
Proceeds from issuances of debt 3,814 8,003 2,860
Repayments of debt (2,173) (5,251) 0
Debt issuance and deferred financing costs (50) (115) (170)
Debt extinguishment costs 0 (14) 0
Distributions to parent 0 0 0
Contributions from parent 0 0 0
Distributions to owners (294) (99) (99)
Net cash provided by (used in) financing activities 1,297 2,524 2,591
Net increase (decrease) in cash, cash equivalents and restricted cash 984 171 (555)
Cash, cash equivalents and restricted cash—beginning of period 605 434 989
Cash, cash equivalents and restricted cash—end of period 1,589 605 434
Parent Issuer [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Cash flows provided by (used in) operating activities (101) (53) (43)
Cash flows from investing activities      
Property, plant and equipment, net 0 0 (1)
Investments in subsidiaries (245) (2,429) (53)
Distributions received from affiliates, net 1,431 218 84
Other   0 0
Net cash provided by (used in) investing activities 1,186 (2,211) 30
Cash flows from financing activities      
Proceeds from issuances of debt 1,500 2,560 0
Repayments of debt (1,470) 0  
Debt issuance and deferred financing costs (22) (73) 0
Debt extinguishment costs   0  
Distributions to parent 0 0 0
Contributions from parent 0 0 0
Distributions to owners (294) (99) (99)
Net cash provided by (used in) financing activities (286) 2,388 (99)
Net increase (decrease) in cash, cash equivalents and restricted cash 799 124 (112)
Cash, cash equivalents and restricted cash—beginning of period 234 110 222
Cash, cash equivalents and restricted cash—end of period 1,033 234 110
Guarantors [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Cash flows provided by (used in) operating activities 431 181 53
Cash flows from investing activities      
Property, plant and equipment, net (21) (7) (25)
Investments in subsidiaries (7) (1) (15)
Distributions received from affiliates, net 782 0 0
Other   (6) 0
Net cash provided by (used in) investing activities 754 (14) (40)
Cash flows from financing activities      
Proceeds from issuances of debt 0 0 0
Repayments of debt 0 (2,486)  
Debt issuance and deferred financing costs 0 0 (1)
Debt extinguishment costs   (14)  
Distributions to parent (1,431) (218) (84)
Contributions from parent 245 2,429 53
Distributions to owners 0 0 0
Net cash provided by (used in) financing activities (1,186) (289) (32)
Net increase (decrease) in cash, cash equivalents and restricted cash (1) (122) (19)
Cash, cash equivalents and restricted cash—beginning of period 13 135 154
Cash, cash equivalents and restricted cash—end of period 12 13 135
Non-Guarantor [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Cash flows provided by (used in) operating activities 657 (130) (207)
Cash flows from investing activities      
Property, plant and equipment, net (1,279) (2,306) (2,861)
Investments in subsidiaries 0 0 0
Distributions received from affiliates, net 0 0 0
Other   (32) (62)
Net cash provided by (used in) investing activities (1,279) (2,338) (2,923)
Cash flows from financing activities      
Proceeds from issuances of debt 2,314 5,443 2,860
Repayments of debt (703) (2,765)  
Debt issuance and deferred financing costs (28) (42) (169)
Debt extinguishment costs   0  
Distributions to parent (782) 0 0
Contributions from parent 7 1 15
Distributions to owners 0 0 0
Net cash provided by (used in) financing activities 808 2,637 2,706
Net increase (decrease) in cash, cash equivalents and restricted cash 186 169 (424)
Cash, cash equivalents and restricted cash—beginning of period 358 189 613
Cash, cash equivalents and restricted cash—end of period 544 358 189
Eliminations [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Cash flows provided by (used in) operating activities (10) 2 26
Cash flows from investing activities      
Property, plant and equipment, net 10 (2) (26)
Investments in subsidiaries 252 2,430 68
Distributions received from affiliates, net (2,213) (218) (84)
Other   0 0
Net cash provided by (used in) investing activities (1,951) 2,210 (42)
Cash flows from financing activities      
Proceeds from issuances of debt 0 0 0
Repayments of debt 0 0  
Debt issuance and deferred financing costs 0 0 0
Debt extinguishment costs   0  
Distributions to parent 2,213 218 84
Contributions from parent (252) (2,430) (68)
Distributions to owners 0 0 0
Net cash provided by (used in) financing activities 1,961 (2,212) 16
Net increase (decrease) in cash, cash equivalents and restricted cash 0 0 0
Cash, cash equivalents and restricted cash—beginning of period 0 0 0
Cash, cash equivalents and restricted cash—end of period $ 0 $ 0 $ 0