Annual report pursuant to Section 13 and 15(d)

Leases - Supplemental Balance Sheet Information (Details)

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Leases - Supplemental Balance Sheet Information (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Jan. 01, 2019
Operating Lease [Abstract]    
Operating lease right-of-use assets $ 466 $ 347
Operating lease current liabilities 46 30
Operating lease liabilities 456 $ 339
Total operating lease liabilities 502  
Finance Lease [Abstract]    
Property and equipment, gross 15  
Accumulated depreciation (12)  
Property and equipment, net 3  
Current maturities of debt 1  
Long-term debt 1  
Total finance lease liabilities $ 2  
Weighted average remaining lease term, operating leases (years) 9 years  
Weighted average remaining lease term, finance leases (years) 2 years  
Weighted average discount rate, operating lease (as a percent) 5.30%  
Weighted average discount rate, finance lease (as a percent) 1.70%