Quarterly report pursuant to Section 13 or 15(d)

Leases - Components of lease expense (Details)

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Leases - Components of lease expense (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Finance lease cost  
Depreciation of leased assets $ 2
Interest on lease liabilities 1
Total finance lease cost 3
Operating lease cost 19
Sublease income (1)
Total lease cost $ 21