Significant Accounting Policies (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Significant Accounting Policies [Line Items]
Operating lease right of use assets		$ 189	$ 0
Operating Lease, Right-of-Use Asset		199
Contract liabilities, current		11
Contract liabilities		11
Advertising and promotion expenses		167	158	$ 154
Cost of sales	[1]	1,992	1,911	1,775
Capitalized internal use software		74	18
Depreciation expense		27	23	21
Accounts receivable, less allowance for doubtful accounts		1,086	1,036
Other receivables		$ 37	41
Percentage of being realized upon settlement		50.00%
Accruals for asset retirement obligations, non current		$ 23	22
Other current liabilities
Significant Accounting Policies [Line Items]
Accruals for sales deductions		190	146
Shipping and Handling [Member]
Significant Accounting Policies [Line Items]
Cost of sales		$ 59	$ 56	$ 53

[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.