Quarterly report pursuant to Section 13 or 15(d)

Leases - Subleases (Details)

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Leases - Subleases (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Leases [Abstract]  
Sublease Payments Receivable in 2019 $ 32
Sublease Income, Total 37
Sublease Income, Variable $ 5