Other (Income) Expense - Net (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Sep. 29, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Income and Expenses [Abstract]
Equity Sold, Percentage				50.00%
Extinguishment of Debt, Amount	$ 559	$ 559
Debt purchase transaction costs				$ 7
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities		$ 0	$ 6	0
Loss Contingency, Loss in Period				$ 45