Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Minimum Payments Under Purchase Commitments and Non-Cancellable Operating Leases

As of December 31, 2017, we had committed to make the following minimum payments under our purchase commitments and non-cancellable operating leases:

	Purchase		Operating
	Commitments		Leases
2018	$	391	$	68
2019		367		45
2020		234		49
2021		37		29
2022		30		24
Thereafter		35		56