Leases-Lessee (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Future minimum annual rentals under noncancelable operating leases
2016	$ 86
2017	74
2018	56
2019	45
2020	39
Thereafter	119
Total	419
Operating leases [Abstract]
Total rent expense	$ 164	$ 109	$ 58