Quarterly report pursuant to Section 13 or 15(d)

Supplemental Guarantor Information Supplemental Guarantor Information - Condensed Consolidating Cash Flows - Balances per Condensed Consolidating Balance Sheet (Details)

v3.10.0.1
Supplemental Guarantor Information Supplemental Guarantor Information - Condensed Consolidating Cash Flows - Balances per Condensed Consolidating Balance Sheet (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Dec. 31, 2016
Balances per Consolidated Balance Sheet:        
Cash and cash equivalents $ 0 $ 0    
Restricted cash 1,457 1,589    
Total cash, cash equivalents and restricted cash 1,457 1,589 $ 1,443 $ 605
Parent Issuer [Member]        
Balances per Consolidated Balance Sheet:        
Cash and cash equivalents 0 0    
Restricted cash 799 1,033    
Total cash, cash equivalents and restricted cash 799 1,033 796 234
Guarantors [Member]        
Balances per Consolidated Balance Sheet:        
Cash and cash equivalents 0 0    
Restricted cash 9 12    
Total cash, cash equivalents and restricted cash 9 12 20 13
Non-Guarantors [Member]        
Balances per Consolidated Balance Sheet:        
Cash and cash equivalents 0 0    
Restricted cash 649 544    
Total cash, cash equivalents and restricted cash 649 544 627 358
Eliminations [Member]        
Balances per Consolidated Balance Sheet:        
Cash and cash equivalents 0 0    
Restricted cash 0 0    
Total cash, cash equivalents and restricted cash $ 0 $ 0 $ 0 $ 0