Leases (Details 1) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease costs	$ 49
Amortization of right-of-use assets	17
Interest on lease liabilities	6
Total finance lease cost	23
Total lease cost	72
Short-term lease costs	13
Vehicles
Lessee, Lease, Description [Line Items]
Operating lease costs	28
Amortization of right-of-use assets	15
Interest on lease liabilities	3
Total finance lease cost	18
Total lease cost	46
Building
Lessee, Lease, Description [Line Items]
Operating lease costs	9
Amortization of right-of-use assets	1
Interest on lease liabilities	3
Total finance lease cost	4
Total lease cost	13
Other
Lessee, Lease, Description [Line Items]
Operating lease costs	12
Amortization of right-of-use assets	1
Interest on lease liabilities	0
Total finance lease cost	1
Total lease cost	$ 13