Commitments (Tables)

12 Months Ended

Dec. 31, 2014

Commitments [Abstract]

Schedule of Future Minimum Lease Payments

The following summarizes future minimum lease payments under operating leases at December 31, 2014:

millions
2015	$	1,022
2016	833
2017	592
2018	324
2019	203
Later years	87
Total future minimum lease payments	$	3,061