Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Supplemental Guarantor Information - Condensed Consolidating Statements of Cash Flows (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Condensed Cash Flow Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities $ 805 $ 324
Cash flows from investing activities    
Property, plant and equipment, net (345) (898)
Investments in subsidiaries 0 0
Distributions received from affiliates, net 0 0
Net cash provided by (used in) investing activities (345) (898)
Cash flows from financing activities    
Proceeds from issuances of debt 0 2,314
Repayments of debt 0 (703)
Debt issuance and deferred financing costs (1) (29)
Distributions to parent 0 0
Contributions from parent 0 0
Distributions to owners (527) (50)
Net cash provided by (used in) financing activities (528) 1,532
Net increase (decrease) in cash, cash equivalents and restricted cash (68) 958
Cash, cash equivalents and restricted cash—beginning of period 1,589 605
Cash, cash equivalents and restricted cash—end of period 1,521 1,563
Parent Issuer [Member]    
Condensed Cash Flow Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities (7) (55)
Cash flows from investing activities    
Property, plant and equipment, net 0 0
Investments in subsidiaries (112) (170)
Distributions received from affiliates, net 277 319
Net cash provided by (used in) investing activities 165 149
Cash flows from financing activities    
Proceeds from issuances of debt   0
Repayments of debt   0
Debt issuance and deferred financing costs (1) 0
Distributions to parent 0 0
Contributions from parent 0 0
Distributions to owners (527) (50)
Net cash provided by (used in) financing activities (528) (50)
Net increase (decrease) in cash, cash equivalents and restricted cash (370) 44
Cash, cash equivalents and restricted cash—beginning of period 1,033 234
Cash, cash equivalents and restricted cash—end of period 663 278
Guarantors [Member]    
Condensed Cash Flow Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities 266 163
Cash flows from investing activities    
Property, plant and equipment, net (18) (12)
Investments in subsidiaries (25) (7)
Distributions received from affiliates, net 0 0
Net cash provided by (used in) investing activities (43) (19)
Cash flows from financing activities    
Proceeds from issuances of debt   0
Repayments of debt   0
Debt issuance and deferred financing costs 0 0
Distributions to parent (335) (319)
Contributions from parent 112 170
Distributions to owners 0 0
Net cash provided by (used in) financing activities (223) (149)
Net increase (decrease) in cash, cash equivalents and restricted cash 0 (5)
Cash, cash equivalents and restricted cash—beginning of period 12 13
Cash, cash equivalents and restricted cash—end of period 12 8
Non-Guarantor [Member]    
Condensed Cash Flow Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities 604 221
Cash flows from investing activities    
Property, plant and equipment, net (327) (891)
Investments in subsidiaries 0 0
Distributions received from affiliates, net 0 0
Net cash provided by (used in) investing activities (327) (891)
Cash flows from financing activities    
Proceeds from issuances of debt   2,314
Repayments of debt   (703)
Debt issuance and deferred financing costs 0 (29)
Distributions to parent 0 0
Contributions from parent 25 7
Distributions to owners 0 0
Net cash provided by (used in) financing activities 25 1,589
Net increase (decrease) in cash, cash equivalents and restricted cash 302 919
Cash, cash equivalents and restricted cash—beginning of period 544 358
Cash, cash equivalents and restricted cash—end of period 846 1,277
Eliminations [Member]    
Condensed Cash Flow Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities (58) (5)
Cash flows from investing activities    
Property, plant and equipment, net 0 5
Investments in subsidiaries 137 177
Distributions received from affiliates, net (277) (319)
Net cash provided by (used in) investing activities (140) (137)
Cash flows from financing activities    
Proceeds from issuances of debt   0
Repayments of debt   0
Debt issuance and deferred financing costs 0 0
Distributions to parent 335 319
Contributions from parent (137) (177)
Distributions to owners 0 0
Net cash provided by (used in) financing activities 198 142
Net increase (decrease) in cash, cash equivalents and restricted cash 0 0
Cash, cash equivalents and restricted cash—beginning of period 0 0
Cash, cash equivalents and restricted cash—end of period $ 0 $ 0