Segment, Geographic and Other Revenue Information - Narrative (Detail) $ in Millions		9 Months Ended	12 Months Ended
		Sep. 29, 2019 USD ($) Operating_Segment	Dec. 31, 2018 USD ($) Operating_Segment
Segment Reporting [Abstract]
Number of segments | Operating_Segment		3	2
Assets | $	[1]	$ 170,446	$ 159,422

[1] Amounts may not add due to rounding.