Income Taxes - Taxes on Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Income Tax Contingency [Line Items]
Effective tax rate for income from continuing operations	22.00%	18.50%	18.40%	18.30%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 1	$ 8		$ 16
Liabilities associated with uncertain tax positions	186		$ 186		$ 182
Other Taxes Payable
Income Tax Contingency [Line Items]
Liabilities associated with uncertain tax positions	184		184		$ 180
Share-based Payments
Income Tax Contingency [Line Items]
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	1	$ 2	24	$ 15
Integration of Acquired Businesses
Income Tax Contingency [Line Items]
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 1		$ 7