Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

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

The following is a summary of annual future minimum lease and rental commitments under noncancelable operating leases as of December 31, 2017:

(In millions)
2018	$	188
2019	154
2020	123
2021	92
2022	80
2023 and Thereafter	169
	$	806