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Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 3,479	$ 4,983	$ 4,996	$ 5,253
Other comprehensive income (loss) before reclassifications			(96)
Amounts reclassified to earnings			10
Net current period other comprehensive income (loss)	49	15	(86)	(9)
Ending balance	3,516	5,004	3,516	5,004
Cumulative Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(479)
Other comprehensive income (loss) before reclassifications			(121)
Amounts reclassified to earnings			0
Net current period other comprehensive income (loss)			(121)
Ending balance	(600)		(600)
Pension and  Postretirement Costs
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(399)
Other comprehensive income (loss) before reclassifications			2
Amounts reclassified to earnings			9
Net current period other comprehensive income (loss)			11
Ending balance	(388)		(388)
Derivative Financial Instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(42)
Other comprehensive income (loss) before reclassifications			23
Amounts reclassified to earnings			1
Net current period other comprehensive income (loss)			24
Ending balance	(18)		(18)
AOCL
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,055)	(937)	(920)	(913)
Ending balance	$ (1,006)	$ (922)	$ (1,006)	$ (922)

X

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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