Other Financial Data - Other Income (Expense) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Interest income (expense), net:
Interest expense	$ (59,000,000)	$ (63,000,000)	$ (119,000,000)	$ (117,000,000)
Interest income	3,000,000	5,000,000	8,000,000	13,000,000
Interest income (expense), net	(56,000,000)	(58,000,000)	(111,000,000)	(104,000,000)
Other,net:
Net periodic pension and postretirement benefit	17,000,000	20,000,000	33,000,000	40,000,000
Loss from the extinguishment of long-term debt	(43,000,000)	0	(43,000,000)	0
Investment impairments	(3,000,000)	0	(11,000,000)	0
Foreign currency gain (loss)	(7,000,000)	11,000,000	(11,000,000)	0
Loss on derivative instruments	(3,000,000)	(19,000,000)	(7,000,000)	(23,000,000)
Gains on equity method investments	0	0	1,000,000	1,000,000
Fair value adjustments to equity investments	16,000,000	0	15,000,000	0
Other	2,000,000	1,000,000	11,000,000	(2,000,000)
Total other income (expense)	$ (21,000,000)	$ 13,000,000	$ (12,000,000)	$ 16,000,000