Lease Arrangements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Lease Arrangements Textuals [Abstract]
Operating Leases, Longest Term, Year	2026
Operating leases, rent expense, net	$ 22	$ 21	$ 22
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	26
Operating Leases, Future Minimum Payments, Due in Two Years	26
Operating Leases, Future Minimum Payments, Due in Three Years	23
Operating Leases, Future Minimum Payments, Due in Four Years	21
Operating Leases, Future Minimum Payments, Due in Five Years	15
Operating Leases, Future Minimum Payments, Due Thereafter	22
Operating Leases, Future Minimum Payments Due	133
Sublease proceeds	(3)
Net lease commitments	$ 130