Income Taxes Income Tax Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating Loss Carryforwards [Line Items]
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Benefit		$ 94		$ 39
Tax Cuts and Jobs Act of 2017, Indirect Impact on Inventory, Income Tax Expense				16
Tax benefit (charge) related to application of the Act's foreign tax provisions	$ 13		$ (83)
Tax charge related to U.S. state blended tax rate changes associated with the Business Separations			146
Tax benefit related to an internal legal entity restructuring associated with the Intended Business Separations			102
Pension Resize [Member]
Operating Loss Carryforwards [Line Items]
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Benefit		114
Swiss Tax Reform [Member]
Operating Loss Carryforwards [Line Items]
Other Tax (Benefit) Expense	$ (38)		(38)
Change in accruals [Member]
Operating Loss Carryforwards [Line Items]
Other Tax (Benefit) Expense			$ (21)
Brazil Valuation Allowance [Member]
Operating Loss Carryforwards [Line Items]
Other Tax (Benefit) Expense		75		75
Repatriation Accrual [Member]
Operating Loss Carryforwards [Line Items]
Other Tax (Benefit) Expense		61		61
2018 DMD [Member]
Operating Loss Carryforwards [Line Items]
Other Tax (Benefit) Expense		27		27
Internal Entity Restructuring [Member]
Operating Loss Carryforwards [Line Items]
Other Tax (Benefit) Expense		$ 26		$ 26