Effective Portion of Pre Tax Gains and Losses on Derivative Instruments (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 24, 2018	Mar. 25, 2017
Derivatives, Fair Value [Line Items]
Cash Flow Hedge (Gain)/Loss to be Reclassified within Twelve Months		$ 28
Fair Value/Non-designated Hedges
Derivatives, Fair Value [Line Items]
(Gains)/Losses Recognized in Income Statement (a)	[1]	118	$ 20
Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Losses/(Gains) Recognized in Accumulated Other Comprehensive Loss		(84)	21
Losses/(Gains) Reclassified from Accumulated Other Comprehensive Loss into Income Statement (b)	[2]	(55)	(33)
Foreign Exchange Forward [Member] | Fair Value/Non-designated Hedges
Derivatives, Fair Value [Line Items]
(Gains)/Losses Recognized in Income Statement (a)	[1]	(12)	(5)
Foreign Exchange Forward [Member] | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Losses/(Gains) Recognized in Accumulated Other Comprehensive Loss		5	20
Losses/(Gains) Reclassified from Accumulated Other Comprehensive Loss into Income Statement (b)	[2]	6	(5)
Interest Rate Contract [Member] | Fair Value/Non-designated Hedges
Derivatives, Fair Value [Line Items]
(Gains)/Losses Recognized in Income Statement (a)	[1]	111	22
Interest Rate Contract [Member] | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Losses/(Gains) Recognized in Accumulated Other Comprehensive Loss		(96)	(19)
Losses/(Gains) Reclassified from Accumulated Other Comprehensive Loss into Income Statement (b)	[2]	(62)	(30)
Commodity Contract [Member] | Fair Value/Non-designated Hedges
Derivatives, Fair Value [Line Items]
(Gains)/Losses Recognized in Income Statement (a)	[1]	19	3
Commodity Contract [Member] | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Losses/(Gains) Recognized in Accumulated Other Comprehensive Loss		(2)	2
Losses/(Gains) Reclassified from Accumulated Other Comprehensive Loss into Income Statement (b)	[2]	1	2
Net Investment Hedging [Member] | Fair Value/Non-designated Hedges
Derivatives, Fair Value [Line Items]
(Gains)/Losses Recognized in Income Statement (a)	[1]	0	0
Net Investment Hedging [Member] | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Losses/(Gains) Recognized in Accumulated Other Comprehensive Loss		9	18
Losses/(Gains) Reclassified from Accumulated Other Comprehensive Loss into Income Statement (b)	[2]	$ 0	$ 0

[1] Foreign exchange derivative losses/gains are primarily included in selling, general and administrative expenses. Interest rate derivative losses/gains are primarily from fair value hedges and are included in interest expense. These losses/gains are substantially offset by decreases/increases in the value of the underlying debt, which are also included in interest expense. Commodity derivative losses/gains are included in either cost of sales or selling, general and administrative expenses, depending on the underlying commodity.

[2] Foreign exchange derivative losses/gains are included in cost of sales. Interest rate derivative losses/gains are included in interest expense. Commodity derivative losses/gains are included in either cost of sales or selling, general and administrative expenses, depending on the underlying commodity.