v3.19.1
Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Jan. 01, 2019
Dec. 31, 2018
Accounting Policies [Line Items]        
Operating Lease, Liability [1] $ 203      
Operating Lease, Right-of-Use Asset [2] 182      
Interest costs capitalized 7 $ 7    
Current 265     $ 167
Non-current 69     34
Total 334     201
Debt service        
Accounting Policies [Line Items]        
Current 17     13
Non-current 7     8
Total 24     21
Construction major maintenance        
Accounting Policies [Line Items]        
Current 24     23
Non-current 29     24
Total 53     47
Security project insurance        
Accounting Policies [Line Items]        
Current 203     120
Non-current 31     0
Total 234     120
Other        
Accounting Policies [Line Items]        
Current 21     11
Non-current 2     2
Total $ 23     $ 13
Accounting Standards Update 2016-02 [Member]        
Accounting Policies [Line Items]        
Operating Lease, Liability     $ 191  
Operating Lease, Right-of-Use Asset     $ 191  
[1] The lease liabilities associated with our operating leases as of March 31, 2019 are included in other current liabilities and other long-term liabilities on our Consolidated Condensed Balance Sheet.
[2] The right-of-use assets associated with our operating leases as of March 31, 2019 are included in other assets on our Consolidated Condensed Balance Sheet.