Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	$ 0	$ 1,133
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	200
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ 93	218	$ 142
Specialty Pharmaceuticals [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration		800
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents		37
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		24
Disposal Group, Including Discontinued Operation, Inventory, Current		79
Disposal Group, Including Discontinued Operation, Other Assets, Current		17
Disposal Group, Including Discontinued Operation, Goodwill, Current		175
Disposal Group, Including Discontinued Operation, Intangible Assets, Current		758
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		45
Assets held for sale		1,133
Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities, Current		25
Disposal Group, Including Discontinued Operation, Other Liabilities, Current		27
Disposal Group, Including Discontinued Operation, Non-current deferred tax liability, Current		148
Disposal Group, Including Discontinued Operation, Liabilities, Current		200
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax		$ 107