Commitments and Contingencies Warranty Reserve Detail (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Product Warranty Liability [Line Items]
Standard Product Warranty Accrual	$ 21	$ 26	$ 26	$ 27
Standard Product Warranty Accrual, Increase for Warranties Issued	37	42	43
Standard Product Warranty Accrual, Decrease for Payments	$ 42	$ 42	$ 44