Income Taxes Income Taxes - Deferred Tax Balances (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Sep. 30, 2018	Dec. 31, 2018		Dec. 31, 2017		Aug. 31, 2017	Dec. 31, 2016
Assets
Deferred Tax Assets, Tax Loss And Tax Credit Carryforwards			$ 1,390		$ 1,452
Deferred Tax Assets, Accrued Employee Benefits			1,802		1,988
Deferred Tax Assets, Other Accruals and Reversals			323		333
Deferred Tax Assets, Intangible Assets			320		284
Deferred Tax Assets, Inventory			129		130
Deferred Tax Assets, Long-Term Debt			24		109
Deferred Tax Assets, Investments			114		23
Deferred Tax Assets, Other			280		260
Deferred Tax Assets, Gross			4,382		4,579
Deferred Tax Assets, Valuation Allowance	[2]		(1,087)	[1]	(1,140)	[3]
Deferred Tax Assets, Net of Valuation Allowance			3,295		3,439
Liabilities
Deferred Tax Liabilities, Property			1,043		1,160
Deferred Tax Liabilities, Accrued Employee Benefits			169		68
Deferred Tax Liabilities, Other Accruals and Reversals			51		39
Deferred Tax Liabilities, Intangible Assets			5,876		6,286
Deferred Tax Liabilities, Inventory			371		597
Deferred Tax Liabilities, Investments			581		453
Deferred Tax Liabilities, Unrealized Exchange Gains/Losses			141		71
Deferred Tax Liabilities, Other			141		121
Deferred Tax Liabilities, Gross			8,373		8,795
Net Deferred Tax Liability			(5,078)		(5,356)
Change in Tax Loss and Credit Carryforwards, Prior Period Restatement					238		$ 163	$ 163
Change in Valuation Allowance, Prior Period Restatement					$ 238		$ 163	$ 163
Successor [Member] | Brazil Valuation Allowance [Member]
Liabilities
Other Tax Expense		$ (75)	$ 75

[1] During the year ended December 31, 2018, the company established a full valuation allowance against the net deferred tax asset position of a legal entity in Brazil due to revised financial projections, resulting in tax expense of $75 million. See Note 14 for additional information.

[2] Primarily related to the realization of recorded tax benefits on tax loss carryforwards from operations in the United States, Brazil, and Luxembourg.

[3] $238 million as a result of a change in the Delaware state apportionment methodology.