Significant Accounting Policies (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Significant Accounting Policies [Line Items]
Operating lease right of use assets		$ 192	$ 189
Operating Lease, Right-of-Use Asset		203	199
Contract liabilities, current		8
Contract liabilities		13
Advertising and promotion expenses		233	167	$ 158
Cost of sales	[1]	2,057	1,992	1,911
Capitalized internal use software		59	74
Depreciation expense		46	27	23
Accounts receivable, less allowance for doubtful accounts		1,013	1,086
Other receivables		$ 48	37
Percentage of being realized upon settlement		50.00%
Accruals for asset retirement obligations, non current		$ 25	23
Accounts Receivable
Significant Accounting Policies [Line Items]
Accruals for sales deductions		185	169
Other current liabilities
Significant Accounting Policies [Line Items]
Accruals for sales deductions		226	190
Shipping and Handling [Member]
Significant Accounting Policies [Line Items]
Cost of sales		$ 66	$ 59	$ 56

[1] Exclusive of amortization of intangible assets, except as disclosed in Note 3. Significant Accounting Policies—Amortization of Intangible Assets, Depreciation and Certain Long-Lived Assets.