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Business Combinations (Allocation) (Details) - Songa
$ in Millions
Jan. 30, 2018
USD ($)
Acquisition price allocation  
Cash and cash equivalents $ 113
Accounts receivable 115
Other current assets 80
Property and equipment 2,414
Goodwill 462
Contract intangible assets 632
Accounts payable and other current liabilities 178
Debt 1,768
Other long-term liabilities 76
Net assets acquired 1,794
Noncontrolling interest in business combination 33
Controlling interest acquired in business combination $ 1,761