Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life.

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Fair Value Measurements (Level 3 Assets Measured at Fair Value on a Nonrecurring Basis) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, impairment loss		$ 0	$ 579,000,000	$ 0
Impairment of intangible assets, indefinite-lived (excluding goodwill)			108,000,000
Impairment of intangible assets, finite-lived			60,000,000
Fair Value, Measurements, Nonrecurring \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill			315,000,000
Indefinite-lived intangible assets			384,000,000
Definite-lived intangible assets			0
Total level 3 assets			699,000,000
Carrying amount \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill			894,000,000
Indefinite-lived intangible assets			492,000,000
Definite-lived intangible assets			60,000,000
Fair Value \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill			315,000,000
Indefinite-lived intangible assets			384,000,000
Definite-lived intangible assets			0
EMEA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, impairment loss	$ 579,000,000	$ 579,000,000	$ 579,000,000