Fair Value Measurements (Major Categories of Financial Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Other current assets		$ 103	[1]	$ 497	[2]
Investments	[3]	16
Other assets		45	[1]	68	[2],[4]
Other accrued liabilities		56	[1]	44	[2]
Other liabilities		406	[1],[5]	353	[2],[4]
Significant Other Observable Inputs (Level 2) [Member]
Other current assets		103	[1]	197	[2]
Other assets		45	[1]	68	[2],[4]
Other accrued liabilities		56	[1]	42	[2]
Other liabilities		386	[1],[5]	333	[2],[4]
Significant Unobservable Inputs (Level 3) [Member]
Other current assets	[2]			300
Investments	[3]	16
Other accrued liabilities	[2]			2
Other liabilities		$ 20	[1],[5]	$ 20	[2],[4]

[1] Derivative assets and liabilities include foreign exchange contracts which are measured using observable inputs for similar assets and liabilities.

[2] Derivative assets and liabilities include foreign exchange contracts which are measured using observable quoted prices for similar assets and liabilities.

[3] One of the Company's equity securities was measured using unobservable (Level 3) inputs, in the amount of $16 million.

[4] At December 31, 2017, other current assets, other accrued liabilities and other liabilities include contingent consideration that was measured using unobservable (level 3) inputs, in the amounts of $300 million, $2 million and $20 million, respectively.

[5] Other liabilities include contingent consideration that was measured using unobservable (Level 3) inputs, in the amount of $20 million.