Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019		Sep. 30, 2019	[1]	Jun. 30, 2019	[1]	Mar. 31, 2019	[1]	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 01, 2019
Integration and Separation Costs	$ 50	[1]	$ 152		$ 330		$ 212		$ 0	$ 744	$ 992
Restricted Cash												$ 319
Percentage of FIFO Inventory	59.00%								62.00%	59.00%
Percentage of Weighted Average Cost Inventory	41.00%								38.00%	41.00%
Minimum [Member]
Definite-Lived Intangible Asset, Useful Life									2 years
Maximum [Member]
Definite-Lived Intangible Asset, Useful Life									25 years
Other Current Assets [Member]
Prepaid Royalties									$ 426
Restricted Cash	$ 409								347	$ 409
Other Assets [Member]
Prepaid Royalties - Long-Term									$ 459

[1] See Note 2 - Summary of Significant Accounting Polices, Note 7 - Restructuring and Asset Related Charges - Net, Note 5 - Divestitures and Other Transactions, and Note 15 - Goodwill and Other Intangible Assets, to the Consolidated Financial Statements for additional information related to integration and separation costs, restructuring and asset related charges - net, and discontinued operations, respectively.