Commitments and Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Long Term Purchase Commitment [Line Items]
Rental and lease expense incurred	$ 98	$ 113	$ 120
Operating Leases
2016	69
2017	53
2018	37
2019	21
2020	19
Thereafter	62
Purchase Commitments
2016	95
2017	54
2018	40
2019	33
2020	17
Thereafter	$ 1
Standard product warranty description	obligate us to repair, replace or credit the purchase price of a covered product back to the buyer.
Capitalized Software Licenses
Capitalized Software Licenses
2016	$ 30
2017	2
2018	0
2019	0
2020	0
Thereafter	$ 0