Operating Leases (Tables)

12 Months Ended

Dec. 31, 2016

Leases, Operating [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Future minimum lease payments under our noncancelable operating leases as of December 31, 2016, are as follows (in millions):

2017	$	554
2018	337
2019	333
2020	338
2021	175
Total	$	1,737